Operating system: See Attached file.

I installed Sage using conda giving the following commands during the
session as per the instructions on the sage website:

conda update --all
anaconda-navigator
conda create -n sage sage
conda activate sage
sage


I then removed the conda environment and reinstalled it following the above
method.  The complete re-instillation session record is detailed in the
file CrashReproduction.txt.
Also included is the SystemInfo as reported by the Linux Mint app.
There are two crash reports, Sage_crash_report_1st.txt being generated from
the original installation and Sage_crash_report.txt from the reinstallation

I have previously installed sage successfully as a binary package.  This I
removed before trying it as a conda package.

Hopefully this will be of some help.

Best regards
Douglas

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System:    Host: douglas-linux Kernel: 4.15.0-45-generic x86_64 bits: 64 
compiler: gcc v: 7.3.0 
           Desktop: Cinnamon 4.0.9 wm: muffin dm: LightDM Distro: Linux Mint 
19.1 Tessa 
           base: Ubuntu 18.04 bionic 
Machine:   Type: Desktop System: Gigabyte product: N/A v: N/A serial: <filter> 
Chassis: type: 3 
           serial: <filter> 
           Mobo: Gigabyte model: H61MA-D2V v: x.x serial: <filter> UEFI: 
American Megatrends v: F6 
           date: 04/17/2013 
CPU:       Topology: Quad Core model: Intel Core i5-3450 bits: 64 type: MCP 
arch: Ivy Bridge 
           rev: 9 L2 cache: 6144 KiB 
           flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 
24742 
           Speed: 1638 MHz min/max: 1600/3500 MHz Core speeds (MHz): 1: 1596 2: 
1596 3: 1596 
           4: 1596 
Graphics:  Device-1: NVIDIA GF108 [GeForce GT 430] vendor: CardExpert driver: 
nvidia v: 390.77 
           bus ID: 01:00.0 chip ID: 10de:0de1 
           Display: x11 server: X.Org 1.19.6 driver: nvidia 
           unloaded: fbdev,modesetting,nouveau,vesa resolution: 1920x1080~60Hz 
           OpenGL: renderer: GeForce GT 430/PCIe/SSE2 v: 4.6.0 NVIDIA 390.77 
direct render: Yes 
Audio:     Device-1: Intel 6 Series/C200 Series Family High Definition Audio 
vendor: Gigabyte 
           driver: snd_hda_intel v: kernel bus ID: 00:1b.0 chip ID: 8086:1c20 
           Device-2: NVIDIA GF108 High Definition Audio vendor: CardExpert 
driver: snd_hda_intel 
           v: kernel bus ID: 01:00.1 chip ID: 10de:0bea 
           Sound Server: ALSA v: k4.15.0-45-generic 
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
vendor: Gigabyte 
           driver: r8169 v: 2.3LK-NAPI port: d000 bus ID: 04:00.0 chip ID: 
10ec:8168 
           IF: enp4s0 state: up speed: 1000 Mbps duplex: full mac: <filter> 
           Device-2: Microsoft Xbox 360 Wireless Adapter type: USB driver: xpad 
bus ID: 3-1:2 
           chip ID: 045e:0719 
           IF-ID-1: docker0 state: down mac: <filter> 
Drives:    Local Storage: total: 4.31 TiB used: 2.17 TiB (50.3%) 
           ID-1: /dev/sda vendor: Seagate model: ST4000DX001-1CE168 size: 3.64 
TiB speed: 3.0 Gb/s 
           serial: <filter> 
           ID-2: /dev/sdb vendor: OCZ model: VERTEX3 size: 111.79 GiB speed: 
3.0 Gb/s 
           serial: <filter> 
           ID-3: /dev/sdc vendor: Intel model: SSDSC2CT120A3 size: 111.79 GiB 
speed: 3.0 Gb/s 
           serial: <filter> 
           ID-4: /dev/sdd type: USB vendor: Seagate model: ST9500325AS size: 
465.76 GiB 
           serial: <filter> 
Partition: ID-1: / size: 40.71 GiB used: 25.77 GiB (63.3%) fs: ext4 dev: 
/dev/sdb2 
           ID-2: /home size: 60.69 GiB used: 47.28 GiB (77.9%) fs: ext4 dev: 
/dev/sdb3 
           ID-3: swap-1 size: 8.00 GiB used: 426.9 MiB (5.2%) fs: swap dev: 
/dev/sdb4 
Sensors:   System Temperatures: cpu: 29.8 C mobo: 27.8 C gpu: nvidia temp: 51 C 
           Fan Speeds (RPM): N/A gpu: nvidia fan: 35% 
Repos:     No active apt repos in: /etc/apt/sources.list 
           Active apt repos in: 
/etc/apt/sources.list.d/additional-repositories.list 
           1: deb [arch=amd64] https: //download.docker.com/linux/ubuntu bionic 
stable
           2: deb https: //dl.winehq.org/wine-builds/ubuntu/ bionic main
           3: deb http: //apt.postgresql.org/pub/repos/apt/ bionic-pgdg main
           Active apt repos in: /etc/apt/sources.list.d/couchbase.list 
           1: deb [ arch=amd64 ] http: 
//packages.couchbase.com/releases/couchbase-server/enterprise/deb/ xenial 
xenial/main
           2: deb [ arch=amd64 ] http: 
//packages.couchbase.com/releases/couchbase-server/community/deb/ xenial 
xenial/main
           3: deb http: //packages.couchbase.com/ubuntu xenial xenial/main
           4: deb http: //packages.couchbase.com/ubuntu bionic bionic/main
           Active apt repos in: 
/etc/apt/sources.list.d/freecad-maintainers-freecad-daily-bionic.list 
           1: deb http: 
//ppa.launchpad.net/freecad-maintainers/freecad-daily/ubuntu bionic main
           2: deb-src http: 
//ppa.launchpad.net/freecad-maintainers/freecad-daily/ubuntu bionic main
           Active apt repos in: 
/etc/apt/sources.list.d/official-package-repositories.list 
           1: deb http: //packages.linuxmint.com tessa main upstream import 
backport
           2: deb http: //ubuntu.mirrors.uk2.net/ubuntu bionic main restricted 
universe multiverse
           3: deb http: //ubuntu.mirrors.uk2.net/ubuntu bionic-updates main 
restricted universe multiverse
           4: deb http: //ubuntu.mirrors.uk2.net/ubuntu bionic-backports main 
restricted universe multiverse
           5: deb http: //security.ubuntu.com/ubuntu/ bionic-security main 
restricted universe multiverse
           6: deb http: //archive.canonical.com/ubuntu/ bionic partner
           Active apt repos in: /etc/apt/sources.list.d/skype-stable.list 
           1: deb [arch=amd64] https: //repo.skype.com/deb stable main
           Active apt repos in: /etc/apt/sources.list.d/steam.list 
           1: deb [arch=amd64,i386] http: //repo.steampowered.com/steam/ 
precise steam
           2: deb-src [arch=amd64,i386] http: //repo.steampowered.com/steam/ 
precise steam
           Active apt repos in: /etc/apt/sources.list.d/vscode.list 
           1: deb [arch=amd64] http: //packages.microsoft.com/repos/vscode 
stable main
           Active apt repos in: /etc/apt/sources.list.d/yarn.list 
           1: deb https: //dl.yarnpkg.com/debian/ stable main
Info:      Processes: 283 Uptime: 1d 58m Memory: 7.75 GiB used: 3.53 GiB 
(45.6%) Init: systemd 
           v: 237 runlevel: 5 default: 2 Compilers: gcc: 7.3.0 alt: 5/7 
           Client: Unknown python3.6 client inxi: 3.0.27 
***************************************************************************

IPython post-mortem report

{'commit_hash': u'033ab93c7',
 'commit_source': 'installation',
 'default_encoding': 'UTF-8',
 'ipython_path': 
'/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/IPython',
 'ipython_version': '5.8.0',
 'os_name': 'posix',
 'platform': 'Linux-4.15.0-45-generic-x86_64-with-debian-buster-sid',
 'sys_executable': '/***/******/miniconda3/envs/sage/bin/python',
 'sys_platform': 'linux2',
 'sys_version': '2.7.14 | packaged by conda-forge | (default, Dec  9 2017, 
16:18:43) \n[GCC 4.8.2 20140120 (Red Hat 4.8.2-15)]'}

***************************************************************************



***************************************************************************

Crash traceback:

---------------------------------------------------------------------------
---------------------------------------------------------------------------
ImportError   Python 2.7.14: /***/******/miniconda3/envs/sage/bin/python
                                                   Tue Feb 19 18:35:47 2019
A problem occurred executing Python code.  Here is the sequence of function
calls leading up to the error, with the most recent (innermost) call last.
/***/******/miniconda3/envs/sage/bin/sage-ipython in <module>()
      1 #!/***/******/miniconda3/envs/sage/bin/python
      2 # -*- coding: utf-8 -*-
      3 """
      4 Sage IPython startup script.
      5 """
      6 
      7 from sage.repl.interpreter import SageTerminalApp
      8 
      9 app = SageTerminalApp.instance()
---> 10 app.initialize()
        global app.initialize = <bound method SageTerminalApp.initialize of 
<sage.repl.interpreter.SageTerminalApp object at 0x7f70eaa0e090>>
     11 app.start()

</***/******/miniconda3/envs/sage/lib/python2.7/site-packages/decorator.pyc:decorator-gen-110>
 in initialize(self=<sage.repl.interpreter.SageTerminalApp object>, argv=None)

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/traitlets/config/application.pyc
 in catch_config_error(method=<function initialize>, 
app=<sage.repl.interpreter.SageTerminalApp object>, *args=(None,), **kwargs={})
     72     TRAITLETS_APPLICATION_RAISE_CONFIG_FILE_ERROR = False
     73 else:
     74     raise ValueError("Unsupported value for environment variable: 
'TRAITLETS_APPLICATION_RAISE_CONFIG_FILE_ERROR' is set to '%s' which is none of 
 {'0', '1', 'false', 'true', ''}."% _envvar )
     75 
     76 
     77 @decorator
     78 def catch_config_error(method, app, *args, **kwargs):
     79     """Method decorator for catching invalid config 
(Trait/ArgumentErrors) during init.
     80 
     81     On a TraitError (generally caused by bad config), this will print 
the trait's
     82     message, and exit the app.
     83 
     84     For use on init methods, to prevent invoking excepthook on invalid 
input.
     85     """
     86     try:
---> 87         return method(app, *args, **kwargs)
        method = <function initialize at 0x7f70e40ea140>
        app = <sage.repl.interpreter.SageTerminalApp object at 0x7f70eaa0e090>
        args = (None,)
        kwargs = {}
     88     except (TraitError, ArgumentError) as e:
     89         app.print_help()
     90         app.log.fatal("Bad config encountered during initialization:")
     91         app.log.fatal(str(e))
     92         app.log.debug("Config at the time: %s", app.config)
     93         app.exit(1)
     94 
     95 
     96 class ApplicationError(Exception):
     97     pass
     98 
     99 
    100 class LevelFormatter(logging.Formatter):
    101     """Formatter with additional `highlevel` record
    102 

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/IPython/terminal/ipapp.pyc
 in initialize(self=<sage.repl.interpreter.SageTerminalApp object>, argv=None)
    301 
    302         return super(TerminalIPythonApp, self).parse_command_line(argv)
    303     
    304     @catch_config_error
    305     def initialize(self, argv=None):
    306         """Do actions after construct, but before starting the app."""
    307         super(TerminalIPythonApp, self).initialize(argv)
    308         if self.subapp is not None:
    309             # don't bother initializing further, starting subapp
    310             return
    311         # print self.extra_args
    312         if self.extra_args and not self.something_to_run:
    313             self.file_to_run = self.extra_args[0]
    314         self.init_path()
    315         # create the shell
--> 316         self.init_shell()
        self.init_shell = <bound method SageTerminalApp.init_shell of 
<sage.repl.interpreter.SageTerminalApp object at 0x7f70eaa0e090>>
    317         # and draw the banner
    318         self.init_banner()
    319         # Now a variety of things that happen after the banner is 
printed.
    320         self.init_gui_pylab()
    321         self.init_extensions()
    322         self.init_code()
    323 
    324     def init_shell(self):
    325         """initialize the InteractiveShell instance"""
    326         # Create an InteractiveShell instance.
    327         # shell.display_banner should always be False for the terminal
    328         # based app, because we call shell.show_banner() by hand below
    329         # so the banner shows *before* all extension loading stuff.
    330         self.shell = self.interactive_shell_class.instance(parent=self,
    331                         profile_dir=self.profile_dir,

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/repl/interpreter.pyc
 in init_shell(self=<sage.repl.interpreter.SageTerminalApp object>)
    747         self.shell.has_sage_extensions = SAGE_EXTENSION in 
self.extensions
    748 
    749         # Load the %lprun extension if available
    750         try:
    751             import line_profiler
    752         except ImportError:
    753             pass
    754         else:
    755             self.extensions.append('line_profiler')
    756 
    757         if self.shell.has_sage_extensions:
    758             self.extensions.remove(SAGE_EXTENSION)
    759 
    760             # load sage extension here to get a crash if
    761             # something is wrong with the sage library
--> 762             self.shell.extension_manager.load_extension(SAGE_EXTENSION)
        self.shell.extension_manager.load_extension = <bound method 
ExtensionManager.load_extension of <IPython.core.extensions.ExtensionManager 
object at 0x7f70e330bcd0>>
        global SAGE_EXTENSION = 'sage'
    763 
    764 

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/IPython/core/extensions.pyc
 in load_extension(self=<IPython.core.extensions.ExtensionManager object>, 
module_str='sage')
     70 
     71         Returns the string "already loaded" if the extension is already 
loaded,
     72         "no load function" if the module doesn't have a 
load_ipython_extension
     73         function, or None if it succeeded.
     74         """
     75         if module_str in self.loaded:
     76             return "already loaded"
     77         
     78         from IPython.utils.syspathcontext import prepended_to_syspath
     79         
     80         with self.shell.builtin_trap:
     81             if module_str not in sys.modules:
     82                 with prepended_to_syspath(self.ipython_extension_dir):
     83                     __import__(module_str)
     84             mod = sys.modules[module_str]
---> 85             if self._call_load_ipython_extension(mod):
        self._call_load_ipython_extension = <bound method 
ExtensionManager._call_load_ipython_extension of 
<IPython.core.extensions.ExtensionManager object at 0x7f70e330bcd0>>
        mod = <module 'sage' from 
'/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/__init__.pyc'>
     86                 self.loaded.add(module_str)
     87             else:
     88                 return "no load function"
     89 
     90     def unload_extension(self, module_str):
     91         """Unload an IPython extension by its module name.
     92 
     93         This function looks up the extension's name in ``sys.modules`` 
and
     94         simply calls ``mod.unload_ipython_extension(self)``.
     95         
     96         Returns the string "no unload function" if the extension 
doesn't define
     97         a function to unload itself, "not loaded" if the extension 
isn't loaded,
     98         otherwise None.
     99         """
    100         if module_str not in self.loaded:

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/IPython/core/extensions.pyc
 in _call_load_ipython_extension(self=<IPython.core.extensions.ExtensionManager 
object>, mod=<module 'sage' from 
'/***/******/miniconda3/e...e/lib/python2.7/site-packages/sage/__init__.pyc'>)
    117         """
    118         from IPython.utils.syspathcontext import prepended_to_syspath
    119 
    120         if (module_str in self.loaded) and (module_str in sys.modules):
    121             self.unload_extension(module_str)
    122             mod = sys.modules[module_str]
    123             with prepended_to_syspath(self.ipython_extension_dir):
    124                 reload(mod)
    125             if self._call_load_ipython_extension(mod):
    126                 self.loaded.add(module_str)
    127         else:
    128             self.load_extension(module_str)
    129 
    130     def _call_load_ipython_extension(self, mod):
    131         if hasattr(mod, 'load_ipython_extension'):
--> 132             mod.load_ipython_extension(self.shell)
        mod.load_ipython_extension = <function load_ipython_extension at 
0x7f70eaa01938>
        self.shell = <sage.repl.interpreter.SageTerminalInteractiveShell object 
at 0x7f70e408aa10>
    133             return True
    134 
    135     def _call_unload_ipython_extension(self, mod):
    136         if hasattr(mod, 'unload_ipython_extension'):
    137             mod.unload_ipython_extension(self.shell)
    138             return True
    139 
    140     def install_extension(self, url, filename=None):
    141         """Download and install an IPython extension. 
    142 
    143         If filename is given, the file will be so named (inside the 
extension
    144         directory). Otherwise, the name from the URL will be used. The 
file must
    145         have a .py or .zip extension; otherwise, a ValueError will be 
raised.
    146 
    147         Returns the full path to the installed file.

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/__init__.pyc 
in 
load_ipython_extension(*args=(<sage.repl.interpreter.SageTerminalInteractiveShell
 object>,))
      1 __all__ = ['all']
      2 
      3 # IPython calls this when starting up
      4 def load_ipython_extension(*args):
      5     import sage.repl.ipython_extension
----> 6     sage.repl.ipython_extension.load_ipython_extension(*args)
        sage.repl.ipython_extension.load_ipython_extension = <function 
load_ipython_extension at 0x7f70e30c48c0>
        args = (<sage.repl.interpreter.SageTerminalInteractiveShell object at 
0x7f70e408aa10>,)

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/repl/ipython_extension.pyc
 in wrapper(*args=(<sage.repl.interpreter.SageTerminalInteractiveShell 
object>,), **kwargs={})
    490         ....:     if work:
    491         ....:         return 'foo worked'
    492         ....:     raise RuntimeError("foo didn't work")
    493         sage: foo(False)
    494         Traceback (most recent call last):
    495         ...
    496         RuntimeError: foo didn't work
    497         sage: foo(True)
    498         'foo worked'
    499         sage: foo(False)
    500         sage: foo(True)
    501     """
    502     @wraps(func)
    503     def wrapper(*args, **kwargs):
    504         if not wrapper.has_run:
--> 505             result = func(*args, **kwargs)
        result = undefined
        global func = undefined
        args = (<sage.repl.interpreter.SageTerminalInteractiveShell object at 
0x7f70e408aa10>,)
        kwargs = {}
    506             wrapper.has_run = True
    507             return result
    508     wrapper.has_run = False
    509     return wrapper
    510 
    511 
    512 @run_once
    513 def load_ipython_extension(ip):
    514     """
    515     Load the extension in IPython.
    516     """
    517     # this modifies ip
    518     SageCustomizations(shell=ip)

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/repl/ipython_extension.pyc
 in 
load_ipython_extension(ip=<sage.repl.interpreter.SageTerminalInteractiveShell 
object>)
    503     def wrapper(*args, **kwargs):
    504         if not wrapper.has_run:
    505             result = func(*args, **kwargs)
    506             wrapper.has_run = True
    507             return result
    508     wrapper.has_run = False
    509     return wrapper
    510 
    511 
    512 @run_once
    513 def load_ipython_extension(ip):
    514     """
    515     Load the extension in IPython.
    516     """
    517     # this modifies ip
--> 518     SageCustomizations(shell=ip)
        global SageCustomizations = <class 
'sage.repl.ipython_extension.SageCustomizations'>
        global shell = undefined
        ip = <sage.repl.interpreter.SageTerminalInteractiveShell object at 
0x7f70e408aa10>

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/repl/ipython_extension.pyc
 in __init__(self=<sage.repl.ipython_extension.SageCustomizations object>, 
shell=<sage.repl.interpreter.SageTerminalInteractiveShell object>)
    361     def __init__(self, shell=None):
    362         """
    363         Initialize the Sage plugin.
    364         """
    365         self.shell = shell
    366 
    367         self.auto_magics = SageMagics(shell)
    368         self.shell.register_magics(self.auto_magics)
    369 
    370         import sage.misc.edit_module as edit_module
    371         self.shell.set_hook('editor', edit_module.edit_devel)
    372 
    373         self.init_inspector()
    374         self.init_line_transforms()
    375 
--> 376         import sage.all # until sage's import hell is fixed
        sage.all = undefined
    377 
    378         self.shell.verbose_quit = True
    379         self.set_quit_hook()
    380 
    381         self.register_interface_magics()
    382 
    383         if SAGE_IMPORTALL == 'yes':
    384             self.init_environment()
    385 
    386     def register_interface_magics(self):
    387         """
    388         Register magics for each of the Sage interfaces
    389         """
    390         from sage.repl.interface_magic import InterfaceMagic
    391         InterfaceMagic.register_all(self.shell)

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/all.py in 
<module>()
     88 
     89 from time                import sleep
     90 
     91 import sage.misc.lazy_import
     92 from sage.misc.all       import *         # takes a while
     93 from sage.typeset.all    import *
     94 from sage.repl.all       import *
     95 
     96 from sage.misc.sh import sh
     97 
     98 from sage.libs.all       import *
     99 from sage.data_structures.all import *
    100 from sage.doctest.all    import *
    101 
    102 from sage.structure.all  import *
--> 103 from sage.rings.all      import *
        global sage.rings.all = undefined
    104 from sage.arith.all      import *
    105 from sage.matrix.all     import *
    106 
    107 from sage.symbolic.all   import *
    108 from sage.modules.all    import *
    109 from sage.monoids.all    import *
    110 from sage.algebras.all   import *
    111 from sage.modular.all    import *
    112 from sage.sat.all        import *
    113 from sage.schemes.all    import *
    114 from sage.graphs.all     import *
    115 from sage.groups.all     import *
    116 from sage.databases.all  import *
    117 from sage.categories.all import *
    118 from sage.sets.all       import *

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/rings/all.py 
in <module>()
     39 
     40 # Rational numbers
     41 from .rational_field import RationalField, QQ
     42 from .rational import Rational
     43 Rationals = RationalField
     44 
     45 # Integers modulo n.
     46 from sage.rings.finite_rings.integer_mod_ring import IntegerModRing, 
Zmod
     47 from sage.rings.finite_rings.integer_mod import IntegerMod, Mod, mod
     48 Integers = IntegerModRing
     49 
     50 # Finite fields
     51 from .finite_rings.all import *
     52 
     53 # Number field
---> 54 from .number_field.all import *
        global number_field.all = undefined
     55 
     56 # Function field
     57 from .function_field.all import *
     58 
     59 # Finite residue fields
     60 from .finite_rings.residue_field import ResidueField
     61 
     62 # p-adic field
     63 from .padics.all import *
     64 from .padics.padic_printing import _printer_defaults as padic_printing
     65 
     66 # Semirings
     67 from .semirings.all import *
     68 
     69 # Real numbers

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/rings/number_field/all.py
 in <module>()
      1 from __future__ import absolute_import
      2 
      3 from .number_field import (NumberField, NumberFieldTower, 
CyclotomicField, QuadraticField,
      4                           is_fundamental_discriminant)
      5 from .number_field_element import NumberFieldElement
      6 
      7 from .order import EquationOrder, GaussianIntegers, EisensteinIntegers
      8 
----> 9 from .totallyreal import enumerate_totallyreal_fields_prim
        global totallyreal = undefined
        global enumerate_totallyreal_fields_prim = undefined
     10 from .totallyreal_data import hermite_constant
     11 from .totallyreal_rel import enumerate_totallyreal_fields_all, 
enumerate_totallyreal_fields_rel
     12 
     13 from .unit_group import UnitGroup

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/rings/number_field/totallyreal_data.pxd
 in init sage.rings.number_field.totallyreal 
(/feedstock_root/build_artefacts/sagelib_1496649974235/work/sage-7.6/build/cythonized/sage/rings/number_field/totallyreal.c:12569)()
      1 cdef double eval_seq_as_poly(int *f, int n, double x)
      2 cdef double newton(int *f, int *df, int n, double x0, double eps)
      3 cdef void newton_in_intervals(int *f, int *df, int n, double *beta, 
double eps, double *rts)
      4 cpdef lagrange_degree_3(int n, int an1, int an2, int an3)
      5 
      6 cimport sage.rings.integer
      7 
      8 cdef int eval_seq_as_poly_int(int *f, int n, int x)
      9 
     10 cdef int easy_is_irreducible(int *a, int n)
     11 
---> 12 cdef class tr_data:
        global cdef = undefined
        global tr_data = undefined
     13 
     14     cdef int n, k
     15     cdef double B
     16     cdef double b_lower, b_upper, gamma
     17 
     18     cdef int *a
     19     cdef int *amax
     20     cdef double *beta
     21     cdef int *gnk
     22 
     23     cdef int *df
     24 
     25     cdef void incr(self, int *f_out, int verbose, int haltk, int phc)
     26 

sage/rings/number_field/totallyreal_data.pyx in init 
sage.rings.number_field.totallyreal_data 
(/feedstock_root/build_artefacts/sagelib_1496649974235/work/sage-7.6/build/cythonized/sage/rings/number_field/totallyreal_data.c:13278)()

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/rings/polynomial/polynomial_ring_constructor.pyc
 in PolynomialRing(base_ring=Integer Ring, arg1='x', arg2=None, sparse=False, 
order='degrevlex', names=None, name='x', var_array=None, implementation=None)
    446         arg2 = [str(x) for x in arg2]
    447     if isinstance(arg2, (int, long, Integer)):
    448         # 3. PolynomialRing(base_ring, names, n, order='degrevlex'):
    449         if not isinstance(arg1, (list, tuple, str)):
    450             raise TypeError("You *must* specify the names of the 
variables.")
    451         n = int(arg2)
    452         names = arg1
    453         R = _multi_variate(base_ring, names, n, sparse, order, 
implementation)
    454 
    455     elif isinstance(arg1, str) or (isinstance(arg1, (list,tuple)) and 
len(arg1) == 1):
    456         if not ',' in arg1:
    457             # 1. PolynomialRing(base_ring, name, sparse=False):
    458             if not arg2 is None:
    459                 raise TypeError("if second arguments is a string with 
no commas, then there must be no other non-optional arguments")
    460             name = arg1
--> 461             R = _single_variate(base_ring, name, sparse, implementation)
        R = None
        global _single_variate = <function _single_variate at 0x7f6fc65a0cf8>
        base_ring = Integer Ring
        name = 'x'
        sparse = False
        implementation = None
    462         else:
    463             # 2-4. PolynomialRing(base_ring, names, order='degrevlex'):
    464             if not arg2 is None:
    465                 raise TypeError("invalid input to PolynomialRing 
function; please see the docstring for that function")
    466             names = arg1.split(',')
    467             R = _multi_variate(base_ring, names, -1, sparse, order, 
implementation)
    468     elif isinstance(arg1, (list, tuple)):
    469             # PolynomialRing(base_ring, names (list or tuple), 
order='degrevlex'):
    470             names = arg1
    471             R = _multi_variate(base_ring, names, -1, sparse, order, 
implementation)
    472 
    473     if arg1 is None and arg2 is None:
    474         raise TypeError("you *must* specify the indeterminates (as not 
None).")
    475     if R is None:
    476         raise TypeError("invalid input (%s, %s, %s) to PolynomialRing 
function; please see the docstring for that function"%(

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/rings/polynomial/polynomial_ring_constructor.pyc
 in _single_variate(base_ring=Integer Ring, name=('x',), sparse=False, 
implementation=None)
    524             R = 
m.PolynomialRing_dense_padic_ring_capped_absolute(base_ring, name)
    525 
    526         elif isinstance(base_ring, padic_base_leaves.pAdicRingFixedMod):
    527             R = m.PolynomialRing_dense_padic_ring_fixed_mod(base_ring, 
name)
    528 
    529         elif base_ring in _CompleteDiscreteValuationRings:
    530             R = m.PolynomialRing_cdvr(base_ring, name, sparse)
    531 
    532         elif base_ring in _CompleteDiscreteValuationFields:
    533             R = m.PolynomialRing_cdvf(base_ring, name, sparse)
    534 
    535         elif base_ring.is_field(proof = False):
    536             R = m.PolynomialRing_field(base_ring, name, sparse)
    537 
    538         elif base_ring.is_integral_domain(proof = False):
--> 539             R = m.PolynomialRing_integral_domain(base_ring, name, 
sparse, implementation)
        R = None
        m.PolynomialRing_integral_domain = <class 
'sage.rings.polynomial.polynomial_ring.PolynomialRing_integral_domain'>
        base_ring = Integer Ring
        name = ('x',)
        sparse = False
        implementation = None
    540         else:
    541             R = m.PolynomialRing_commutative(base_ring, name, sparse)
    542     else:
    543         R = m.PolynomialRing_general(base_ring, name, sparse)
    544 
    545     if hasattr(R, '_implementation_names'):
    546         for name in R._implementation_names:
    547             real_key = key[0:3] + (name,)
    548             _save_in_cache(real_key, R)
    549     else:
    550         _save_in_cache(key, R)
    551     return R
    552 
    553 def _multi_variate(base_ring, names, n, sparse, order, implementation):
    554 #    if not sparse:

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/rings/polynomial/polynomial_ring.pyc
 in __init__(self=Univariate Polynomial Ring in x over Integer Ring, 
base_ring=Integer Ring, name=('x',), sparse=False, implementation=None, 
element_class=<type 
'sage.rings.polynomial.polynomial_integer_dense_flint.Polynomial_integer_dense_flint'>,
 category=None)
   1588             if is_IntegerRing(base_ring) and not sparse:
   1589                 if implementation == 'NTL':
   1590                     from 
sage.rings.polynomial.polynomial_integer_dense_ntl \
   1591                             import Polynomial_integer_dense_ntl
   1592                     element_class = Polynomial_integer_dense_ntl
   1593                     self._implementation_names = ('NTL',)
   1594                     self._implementation_repr = ' (using NTL)'
   1595                 elif implementation == 'FLINT' or implementation is 
None:
   1596                     from 
sage.rings.polynomial.polynomial_integer_dense_flint \
   1597                             import Polynomial_integer_dense_flint
   1598                     element_class = Polynomial_integer_dense_flint
   1599                     self._implementation_names = (None, 'FLINT')
   1600                 else:
   1601                     raise ValueError("Unknown implementation %s for 
ZZ[x]"%implementation)
   1602         PolynomialRing_commutative.__init__(self, base_ring, name=name,
-> 1603                 sparse=sparse, element_class=element_class, 
category=category)
        sparse = False
        element_class = <type 
'sage.rings.polynomial.polynomial_integer_dense_flint.Polynomial_integer_dense_flint'>
        category = None
   1604 
   1605     def _repr_(self):
   1606         """
   1607         TESTS::
   1608 
   1609             sage: from sage.rings.polynomial.polynomial_ring import 
PolynomialRing_integral_domain as PRing
   1610             sage: R = PRing(ZZ, 'x', implementation='NTL'); R
   1611             Univariate Polynomial Ring in x over Integer Ring (using 
NTL)
   1612         """
   1613         s = PolynomialRing_commutative._repr_(self)
   1614         return s + self._implementation_repr
   1615 
   1616 
   1617 class PolynomialRing_field(PolynomialRing_integral_domain,
   1618                            PolynomialRing_singular_repr,

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/rings/polynomial/polynomial_ring.pyc
 in __init__(self=Univariate Polynomial Ring in x over Integer Ring, 
base_ring=Integer Ring, name=('x',), sparse=False, element_class=<type 
'sage.rings.polynomial.polynomial_integer_dense_flint.Polynomial_integer_dense_flint'>,
 category=Join of Category of unique factorization domains...s and infinite 
enumerated sets and metric spaces))
   1459         if max_degree is not None and of_degree is None:
   1460             return self._monics_max( max_degree )
   1461         raise ValueError("you should pass exactly one of of_degree and 
max_degree")
   1462 
   1463 class PolynomialRing_commutative(PolynomialRing_general, 
commutative_algebra.CommutativeAlgebra):
   1464     """
   1465     Univariate polynomial ring over a commutative ring.
   1466     """
   1467     def __init__(self, base_ring, name=None, sparse=False, 
element_class=None, category=None):
   1468         if base_ring not in _CommutativeRings:
   1469             raise TypeError("Base ring %s must be a commutative 
ring."%repr(base_ring))
   1470         # We trust that, if a category is given, that it is useful.
   1471         if category is None:
   1472             category = 
polynomial_default_category(base_ring.category(),False)
   1473         PolynomialRing_general.__init__(self, base_ring, name=name,
-> 1474                 sparse=sparse, element_class=element_class, 
category=category)
        sparse = False
        element_class = <type 
'sage.rings.polynomial.polynomial_integer_dense_flint.Polynomial_integer_dense_flint'>
        category = Join of Category of unique factorization domains and 
Category of commutative algebras over (euclidean domains and infinite 
enumerated sets and metric spaces)
   1475 
   1476     def quotient_by_principal_ideal(self, f, names=None):
   1477         """
   1478         Return the quotient of this polynomial ring by the principal
   1479         ideal (generated by) `f`.
   1480 
   1481         INPUT:
   1482 
   1483         - ``f`` - either a polynomial in ``self``, or a principal
   1484           ideal of ``self``.
   1485 
   1486         EXAMPLES::
   1487 
   1488             sage: R.<x> = QQ[]
   1489             sage: I = (x^2-1)*R

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/rings/polynomial/polynomial_ring.pyc
 in __init__(self=Univariate Polynomial Ring in x over Integer Ring, 
base_ring=Integer Ring, name=('x',), sparse=False, element_class=<type 
'sage.rings.polynomial.polynomial_integer_dense_flint.Polynomial_integer_dense_flint'>,
 category=Join of Category of unique factorization domains...s and infinite 
enumerated sets and metric spaces))
    275         self._has_singular = False
    276         # Algebra.__init__ also calls __init_extra__ of 
Algebras(...).parent_class, which
    277         # tries to provide a conversion from the base ring, if it does 
not exist.
    278         # This is for algebras that only do the generic stuff in their 
initialisation.
    279         # But the attribute _no_generic_basering_coercion prevents that 
from happening,
    280         # since we want to use PolynomialBaseringInjection.
    281         sage.algebras.algebra.Algebra.__init__(self, base_ring, 
names=name, normalize=True, category=category)
    282         self.__generator = self.element_class(self, [0,1], is_gen=True)
    283         self._populate_coercion_lists_(
    284                 #coerce_list = [base_inject],
    285                 #convert_list = [list, base_inject],
    286                 convert_method_name = '_polynomial_')
    287         if is_PolynomialRing(base_ring):
    288             self._Karatsuba_threshold = 0
    289         else:
--> 290             from sage.matrix.matrix_space import MatrixSpace
        global sage.matrix.matrix_space = undefined
        MatrixSpace = undefined
    291             if isinstance(base_ring, MatrixSpace):
    292                 self._Karatsuba_threshold = 0
    293             else:
    294                 self._Karatsuba_threshold = 8
    295 
    296     def __reduce__(self):
    297         import sage.rings.polynomial.polynomial_ring_constructor
    298         return 
(sage.rings.polynomial.polynomial_ring_constructor.PolynomialRing,
    299                 (self.base_ring(), self.variable_name(), None, 
self.is_sparse()))
    300 
    301 
    302     def _element_constructor_(self, x=None, check=True, is_gen=False,
    303                               construct=False, **kwds):
    304         r"""
    305         Convert ``x`` into this univariate polynomial ring,

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/matrix/matrix_space.pyc
 in <module>()
     33 
#*****************************************************************************
     34 from __future__ import print_function, absolute_import
     35 from six.moves import range
     36 from six import iteritems
     37 
     38 # System imports
     39 import sys
     40 import types
     41 import operator
     42 
     43 # Sage matrix imports
     44 from . import matrix
     45 from . import matrix_generic_dense
     46 from . import matrix_generic_sparse
     47 
---> 48 from . import matrix_modn_sparse
        global matrix_modn_sparse = undefined
     49 
     50 from . import matrix_mod2_dense
     51 from . import matrix_gf2e_dense
     52 
     53 from . import matrix_integer_dense
     54 from . import matrix_integer_sparse
     55 
     56 from . import matrix_rational_dense
     57 from . import matrix_rational_sparse
     58 
     59 from . import matrix_polynomial_dense
     60 from . import matrix_mpolynomial_dense
     61 
     62 # Sage imports
     63 from sage.misc.superseded import deprecation

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/matrix/matrix_integer_dense.pxd
 in init sage.matrix.matrix_modn_sparse 
(/feedstock_root/build_artefacts/sagelib_1496649974235/work/sage-7.6/build/cythonized/sage/matrix/matrix_modn_sparse.c:15049)()
      1 from sage.libs.gmp.types cimport *
      2 from sage.libs.flint.types cimport fmpz_mat_t
      3 
      4 from .matrix_dense cimport Matrix_dense
      5 from sage.rings.integer cimport Integer
      6 from sage.ext.mod_int cimport *
      7 
      8 ctypedef long* GEN
      9 
---> 10 cdef class Matrix_integer_dense(Matrix_dense):
        global cdef = undefined
        global Matrix_integer_dense = undefined
        global Matrix_dense = undefined
     11     cdef fmpz_mat_t _matrix  # Always initialized in __cinit__
     12     cdef bint _initialized_mpz
     13     cdef mpz_t * _entries    # Only used if _initialized_mpz
     14     cdef mpz_t ** _rows      # Only used if _initialized_mpz
     15     cdef object _pivots
     16     cdef int mpz_height(self, mpz_t height) except -1
     17     cdef _mod_int_c(self, mod_int modulus)
     18     cdef _mod_two(self)
     19     cdef _pickle_version0(self)
     20     cdef _unpickle_version0(self, data)
     21     cpdef _export_as_string(self, int base=?)
     22     cdef inline int _init_mpz(self) except -1
     23     cdef int _init_mpz_impl(self) except -1
     24     cdef inline int _init_linbox(self) except -1
     25     cdef void _dealloc_mpz(self)
     26     cdef void set_unsafe_mpz(self, Py_ssize_t i, Py_ssize_t j, const 
mpz_t value)
     27     cdef void set_unsafe_si(self, Py_ssize_t i, Py_ssize_t j, long 
value)
     28     cdef void set_unsafe_double(self, Py_ssize_t i, Py_ssize_t j, 
double value)
     29     cdef inline void get_unsafe_mpz(self, Py_ssize_t i, Py_ssize_t j, 
mpz_t value)
     30     cdef inline double get_unsafe_double(self, Py_ssize_t i, Py_ssize_t 
j)
     31 

/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/matrix/matrix_modn_dense_template_header.pxi
 in init sage.matrix.matrix_integer_dense 
(/feedstock_root/build_artefacts/sagelib_1496649974235/work/sage-7.6/build/cythonized/sage/matrix/matrix_integer_dense.c:57312)()
      1 """
      2 Dense Matrix Template for C/C++ Library Interfaces
      3 """
      4 
      5 from sage.ext.mod_int cimport *
      6 from sage.matrix.matrix_dense cimport Matrix_dense
      7 
----> 8 cdef class Matrix_modn_dense_template(Matrix_dense):
        global cdef = undefined
        global Matrix_modn_dense_template = undefined
        global Matrix_dense = undefined
      9     cdef celement **_matrix
     10     cdef celement *_entries
     11     cdef mod_int p
     12     cdef xgcd_eliminate (self, celement * row1, celement* row2, 
Py_ssize_t start_col)
     13     cdef set_unsafe_int(self, Py_ssize_t i, Py_ssize_t j, int value)
     14     cpdef _export_as_string(self)
     15     cdef int _copy_row_to_mod_int_array(self, mod_int *to, Py_ssize_t i)

ImportError: 
/***/******/miniconda3/envs/sage/lib/python2.7/site-packages/sage/matrix/../../../../liblinboxsage.so.0:
 undefined symbol: _ZNK6Givaro7IntegercvSsEv

***************************************************************************

History of session input:
*** Last line of input (may not be in above history):
(base) d****@****** ~ $ conda env --remove -n sage
usage: conda-env [-h] {create,export,list,remove,update} ...
conda-env: error: invalid choice: 'sage' (choose from 'create', 'export', 
'list', 'remove', 'update')
(base) d****@****** ~ $ conda-env list
# conda environments:
#
base                  *  /***/******/miniconda3
sage                     /***/******/miniconda3/envs/sage

(base) d****@****** ~ $ conda env remove -n sage

Remove all packages in environment /***/******/miniconda3/envs/sage:

(base) d****@****** ~ $ conda config --add channels conda-forge
Warning: 'conda-forge' already in 'channels' list, moving to the top
(base) d****@****** ~ $ conda update --all
Collecting package metadata: done
Solving environment: done

## Package Plan ##

  environment location: /***/******/miniconda3


The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    lz4-c-1.8.1.2              |                0         103 KB  conda-forge
    zstd-1.3.8                 |    h7510944_1002         959 KB  conda-forge
    ------------------------------------------------------------
                                           Total:         1.0 MB

The following NEW packages will be INSTALLED:

  lz4-c              conda-forge/linux-64::lz4-c-1.8.1.2-0

The following packages will be UPDATED:

  zstd                                              1.3.3-1 --> 
1.3.8-h7510944_1002

The following packages will be DOWNGRADED:

  libtiff                              4.0.10-h9022e91_1002 --> 
4.0.10-h648cc4a_1001


Proceed ([y]/n)? 


Downloading and Extracting Packages
lz4-c-1.8.1.2        | 103 KB    | 
############################################################################# | 
100% 
zstd-1.3.8           | 959 KB    | 
############################################################################# | 
100% 
Preparing transaction: done
Verifying transaction: done
Executing transaction: done
(base) d****@****** ~ $ conda create -n sage sage
Collecting package metadata: done
Solving environment: done

## Package Plan ##

  environment location: /***/******/miniconda3/envs/sage

  added / updated specs:
    - sage


The following NEW packages will be INSTALLED:

  _r-mutex           pkgs/r/linux-64::_r-mutex-1.0.0-anacondar_1
  alabaster          conda-forge/noarch::alabaster-0.7.12-py_0
  arb                conda-forge/linux-64::arb-2.9.0-1
  attrs              conda-forge/noarch::attrs-18.2.0-py_0
  backports          conda-forge/noarch::backports-1.0-py_2
  backports.os       conda-forge/linux-64::backports.os-0.1.1-py27_1000
  backports.shutil_~ 
conda-forge/noarch::backports.shutil_get_terminal_size-1.0.0-py_3
  backports_abc      conda-forge/noarch::backports_abc-0.5-py_1
  bdw-gc             conda-forge/linux-64::bdw-gc-8.0.2-h6bb024c_0
  blas               conda-forge/linux-64::blas-1.1-openblas
  bleach             conda-forge/noarch::bleach-3.1.0-py_0
  boost-cpp          conda-forge/linux-64::boost-cpp-1.64.0-1
  brial              conda-forge/linux-64::brial-0.8.7-py27_2
  bzip2              conda-forge/linux-64::bzip2-1.0.6-h14c3975_1002
  ca-certificates    conda-forge/linux-64::ca-certificates-2018.11.29-ha4d7672_0
  cairo              conda-forge/linux-64::cairo-1.14.6-5
  cddlib             conda-forge/linux-64::cddlib-1!0.94j-ha14ba45_1001
  certifi            conda-forge/linux-64::certifi-2018.11.29-py27_1000
  cliquer            conda-forge/linux-64::cliquer-1.21-0
  configparser       conda-forge/linux-64::configparser-3.7.1-py27_0
  contextlib2        conda-forge/noarch::contextlib2-0.5.5-py_2
  curl               conda-forge/linux-64::curl-7.61.0-h93b3f91_2
  cvxopt             conda-forge/linux-64::cvxopt-1.1.9-py27_blas_openblas_201
  cycler             conda-forge/noarch::cycler-0.10.0-py_1
  cysignals          conda-forge/linux-64::cysignals-1.4.0-py27_1
  cython             conda-forge/linux-64::cython-0.29.5-py27hf484d3e_0
  decorator          conda-forge/noarch::decorator-4.3.2-py_0
  docutils           conda-forge/linux-64::docutils-0.14-py27_1001
  ecl                conda-forge/linux-64::ecl-16.1.3-4
  eclib              conda-forge/linux-64::eclib-20171219-0
  ecm                conda-forge/linux-64::ecm-7.0.4-ha14ba45_1002
  entrypoints        conda-forge/linux-64::entrypoints-0.3-py27_1000
  enum34             conda-forge/linux-64::enum34-1.1.6-py27_1001
  expat              conda-forge/linux-64::expat-2.2.5-hf484d3e_1002
  fastcache          conda-forge/linux-64::fastcache-1.0.2-py27h14c3975_1001
  fflas-ffpack       conda-forge/linux-64::fflas-ffpack-2.2.2-blas_openblas_0
  fftw               conda-forge/linux-64::fftw-3.3.8-h14c3975_1002
  flintqs            conda-forge/linux-64::flintqs-1.0-0
  fontconfig         conda-forge/linux-64::fontconfig-2.12.1-6
  fplll              conda-forge/linux-64::fplll-5.2.0-0
  fpylll             conda-forge/linux-64::fpylll-0.3.0dev-py27_1
  freetype           conda-forge/linux-64::freetype-2.7-2
  functools32        conda-forge/noarch::functools32-3.2.3.2-py_3
  future             conda-forge/linux-64::future-0.17.1-py27_1000
  futures            conda-forge/linux-64::futures-3.2.0-py27_1000
  gap                conda-forge/linux-64::gap-4.8.6-2
  gettext            conda-forge/linux-64::gettext-0.19.8.1-h9745a5d_1001
  gf2x               conda-forge/linux-64::gf2x-1.1-0
  gfan               conda-forge/linux-64::gfan-0.6.2-h0eace8b_1
  giac               conda-forge/linux-64::giac-1.2.3.25-blas_openblas_0
  giflib             conda-forge/linux-64::giflib-5.1.4-h14c3975_1001
  givaro             conda-forge/linux-64::givaro-4.0.4-he08cec2_1001
  glib               conda-forge/linux-64::glib-2.51.4-0
  glpk               conda-forge/linux-64::glpk-4.61-1
  gmp                conda-forge/linux-64::gmp-6.1.2-hf484d3e_1000
  gmpy2              conda-forge/linux-64::gmpy2-2.0.8-py27_1
  graphite2          conda-forge/linux-64::graphite2-1.3.13-hf484d3e_1000
  gsl                conda-forge/linux-64::gsl-2.2.1-blas_openblas_3
  harfbuzz           conda-forge/linux-64::harfbuzz-1.4.3-0
  icu                conda-forge/linux-64::icu-58.2-hf484d3e_1000
  iml                conda-forge/linux-64::iml-1.0.5-blas_openblas_0
  importlib_metadata conda-forge/linux-64::importlib_metadata-0.8-py27_0
  ipaddress          conda-forge/noarch::ipaddress-1.0.22-py_1
  ipykernel          conda-forge/linux-64::ipykernel-4.10.0-py27_1
  ipython            conda-forge/linux-64::ipython-5.8.0-py27_0
  ipython_genutils   conda-forge/noarch::ipython_genutils-0.2.0-py_1
  ipywidgets         conda-forge/noarch::ipywidgets-7.4.2-py_0
  jinja2             conda-forge/linux-64::jinja2-2.9.6-py27_0
  jpeg               conda-forge/linux-64::jpeg-9c-h14c3975_1001
  jsonschema         conda-forge/linux-64::jsonschema-3.0.0a3-py27_1000
  jupyter_client     conda-forge/noarch::jupyter_client-5.2.4-py_1
  jupyter_core       conda-forge/noarch::jupyter_core-4.4.0-py_0
  krb5               conda-forge/linux-64::krb5-1.14.6-0
  lcalc              conda-forge/linux-64::lcalc-1.23-0
  libffi             conda-forge/linux-64::libffi-3.2.1-hf484d3e_1005
  libflint           conda-forge/linux-64::libflint-2.5.2-1
  libgap             conda-forge/linux-64::libgap-4.8.6-0
  libgcc             conda-forge/linux-64::libgcc-7.2.0-h69d50b8_2
  libgcc-ng          conda-forge/linux-64::libgcc-ng-7.3.0-hdf63c60_0
  libgd              conda-forge/linux-64::libgd-2.2.5-2
  libgfortran        conda-forge/linux-64::libgfortran-3.0.0-1
  libgfortran-ng     conda-forge/linux-64::libgfortran-ng-7.2.0-hdf63c60_3
  libiconv           conda-forge/linux-64::libiconv-1.15-h14c3975_1004
  libpng             conda-forge/linux-64::libpng-1.6.28-2
  libsodium          conda-forge/linux-64::libsodium-1.0.16-h14c3975_1001
  libssh2            conda-forge/linux-64::libssh2-1.8.0-h1ad7b7a_1003
  libstdcxx-ng       conda-forge/linux-64::libstdcxx-ng-7.3.0-hdf63c60_0
  libtiff            conda-forge/linux-64::libtiff-4.0.7-1
  libwebp            conda-forge/linux-64::libwebp-0.5.2-7
  libxml2            conda-forge/linux-64::libxml2-2.9.8-h143f9aa_1005
  linbox             conda-forge/linux-64::linbox-1.4.2-0
  lrcalc             conda-forge/linux-64::lrcalc-1.2-hf484d3e_1000
  m4ri               conda-forge/linux-64::m4ri-20140914-0
  m4rie              conda-forge/linux-64::m4rie-20150908-0
  markupsafe         conda-forge/linux-64::markupsafe-1.1.0-py27h14c3975_1000
  matplotlib         conda-forge/linux-64::matplotlib-2.0.0-np111py27_2
  maxima             conda-forge/linux-64::maxima-5.39.0-2
  metis              conda-forge/linux-64::metis-5.1.0-hf484d3e_1003
  mistune            conda-forge/linux-64::mistune-0.8.4-py27h14c3975_1000
  mpc                conda-forge/linux-64::mpc-1.0.3-4
  mpfi               conda-forge/linux-64::mpfi-1.5.3-0
  mpfr               conda-forge/linux-64::mpfr-3.1.5-0
  mpmath             conda-forge/noarch::mpmath-1.1.0-py_0
  nauty              conda-forge/linux-64::nauty-2.6.7-h14c3975_1000
  nbconvert          conda-forge/noarch::nbconvert-5.3.1-py_1
  nbformat           conda-forge/noarch::nbformat-4.4.0-py_1
  ncurses            conda-forge/linux-64::ncurses-5.9-10
  networkx           conda-forge/noarch::networkx-2.2-py_1
  notebook           conda-forge/linux-64::notebook-5.7.4-py27_1000
  ntl                conda-forge/linux-64::ntl-10.3.0-1
  numpy              conda-forge/linux-64::numpy-1.11.3-py27_blas_openblas_202
  openblas           conda-forge/linux-64::openblas-0.2.19-2
  openssl            conda-forge/linux-64::openssl-1.0.2p-h14c3975_1002
  palp               conda-forge/linux-64::palp-2.1-0
  pandoc             conda-forge/linux-64::pandoc-2.6-1
  pandocfilters      conda-forge/noarch::pandocfilters-1.4.2-py_1
  pango              conda-forge/linux-64::pango-1.40.4-0
  pari               conda-forge/linux-64::pari-2.9.4-pl5.22.0.1_0
  path.py            conda-forge/noarch::path.py-11.5.0-py_0
  pathlib2           conda-forge/linux-64::pathlib2-2.3.3-py27_1000
  pcre               conda-forge/linux-64::pcre-8.39-0
  perl               conda-forge/linux-64::perl-5.22.0.1-0
  pexpect            conda-forge/linux-64::pexpect-4.6.0-py27_1000
  pickleshare        conda-forge/linux-64::pickleshare-0.7.5-py27_1000
  pip                conda-forge/linux-64::pip-19.0.2-py27_0
  pixman             conda-forge/linux-64::pixman-0.34.0-h14c3975_1003
  pkgconfig          conda-forge/linux-64::pkgconfig-1.3.1-py27_1001
  planarity          conda-forge/linux-64::planarity-3.0.0.5-h14c3975_1002
  ppl                conda-forge/linux-64::ppl-1.2-0
  prometheus_client  conda-forge/noarch::prometheus_client-0.5.0-py_0
  prompt_toolkit     conda-forge/noarch::prompt_toolkit-1.0.15-py_1
  psutil             conda-forge/linux-64::psutil-5.5.1-py27h14c3975_0
  ptyprocess         conda-forge/linux-64::ptyprocess-0.6.0-py27_1000
  pycrypto           conda-forge/linux-64::pycrypto-2.6.1-py27h14c3975_1002
  pygments           conda-forge/noarch::pygments-2.3.1-py_0
  pynac              conda-forge/linux-64::pynac-0.7.5-py27_1
  pyparsing          conda-forge/noarch::pyparsing-2.3.1-py_0
  pyqt               conda-forge/linux-64::pyqt-4.11.4-py27_3
  pyrsistent         conda-forge/linux-64::pyrsistent-0.14.10-py27h14c3975_0
  python             conda-forge/linux-64::python-2.7.14-2
  python-dateutil    conda-forge/noarch::python-dateutil-2.8.0-py_0
  pytz               conda-forge/noarch::pytz-2018.9-py_0
  pyzmq              conda-forge/linux-64::pyzmq-17.1.2-py27h6afc9c9_1001
  qd                 conda-forge/linux-64::qd-2.3.22-h1c2f66e_1002
  qt                 conda-forge/linux-64::qt-4.8.7-7
  r-base             conda-forge/linux-64::r-base-3.4.1-2
  ratpoints          conda-forge/linux-64::ratpoints-2.1.3-ha14ba45_1002
  readline           conda-forge/linux-64::readline-6.2-0
  rpy2               conda-forge/linux-64::rpy2-2.8.5-py27r3.4.1_0
  rubiks             conda-forge/linux-64::rubiks-20070912-hf484d3e_1001
  rw                 conda-forge/linux-64::rw-0.7-1
  sage               conda-forge/linux-64::sage-7.6-py27_2
  sagelib            conda-forge/linux-64::sagelib-7.6-np111py27_blas_openblas_1
  sagemath-db-combi~ 
conda-forge/noarch::sagemath-db-combinatorial-designs-20140630-1
  sagemath-db-conwa~ 
conda-forge/linux-64::sagemath-db-conway-polynomials-0.4.p0-0
  sagemath-db-ellip~ 
conda-forge/noarch::sagemath-db-elliptic-curves-0.8-ha4d7672_1
  sagemath-db-graphs conda-forge/noarch::sagemath-db-graphs-20161026-1
  sagemath-db-polyt~ conda-forge/noarch::sagemath-db-polytopes-20170220-1
  scandir            conda-forge/linux-64::scandir-1.9.0-py27h14c3975_1000
  scipy              conda-forge/linux-64::scipy-0.19.1-py27_blas_openblas_202
  send2trash         conda-forge/noarch::send2trash-1.5.0-py_0
  setuptools         conda-forge/linux-64::setuptools-40.8.0-py27_0
  simplegeneric      conda-forge/noarch::simplegeneric-0.8.1-py_1
  singledispatch     conda-forge/linux-64::singledispatch-3.4.0.3-py27_1000
  singular           conda-forge/linux-64::singular-4.1.0-0
  sip                conda-forge/linux-64::sip-4.18-py27_1
  six                conda-forge/linux-64::six-1.12.0-py27_1000
  sqlite             conda-forge/linux-64::sqlite-3.13.0-1
  ssl_match_hostname conda-forge/noarch::ssl_match_hostname-3.7.0.1-py_1000
  subprocess32       conda-forge/linux-64::subprocess32-3.5.3-py27h14c3975_0
  suitesparse        conda-forge/linux-64::suitesparse-4.5.4-blas_openblas_200
  symmetrica         conda-forge/linux-64::symmetrica-2.0-0
  sympow             conda-forge/linux-64::sympow-3.0.5-h14c3975_1000
  sympy              conda-forge/linux-64::sympy-1.3-py27_1000
  tbb                conda-forge/linux-64::tbb-2019.3-h6bb024c_1000
  terminado          conda-forge/linux-64::terminado-0.8.1-py27_1001
  testpath           conda-forge/linux-64::testpath-0.4.2-py27_1000
  tk                 conda-forge/linux-64::tk-8.5.19-2
  tornado            conda-forge/linux-64::tornado-5.1.1-py27h14c3975_1000
  traitlets          conda-forge/linux-64::traitlets-4.3.2-py27_1000
  wcwidth            conda-forge/noarch::wcwidth-0.1.7-py_1
  webencodings       conda-forge/noarch::webencodings-0.5.1-py_1
  wheel              conda-forge/linux-64::wheel-0.33.0-py27_0
  widgetsnbextension conda-forge/linux-64::widgetsnbextension-3.4.2-py27_1000
  xz                 conda-forge/linux-64::xz-5.2.4-h14c3975_1001
  zeromq             conda-forge/linux-64::zeromq-4.2.5-hf484d3e_1006
  zipp               conda-forge/noarch::zipp-0.3.3-py_0
  zlib               conda-forge/linux-64::zlib-1.2.11-h14c3975_1004
  zn_poly            conda-forge/linux-64::zn_poly-0.9-ha14ba45_1002


Proceed ([y]/n)? 

Preparing transaction: done
Verifying transaction: done
Executing transaction: \ Enabling notebook extension 
jupyter-js-widgets/extension...
      - Validating: OK

done
#
# To activate this environment, use
#
#     $ conda activate sage
#
# To deactivate an active environment, use
#
#     $ conda deactivate

(base) d****@****** ~ $ conda activate sage
(sage) d****@****** ~ $ sage
┌────────────────────────────────────────────────────────────────────┐
│ SageMath version 7.6, Release Date: 2017-03-25                     │
│ Type "notebook()" for the browser-based notebook interface.        │
│ Type "help()" for help.                                            │
└────────────────────────────────────────────────────────────────────┘

**********************************************************************

Oops, Sage crashed. We do our best to make it stable, but...

A crash report was automatically generated with the following information:
  - A verbatim copy of the crash traceback.
  - A copy of your input history during this session.
  - Data on your current Sage configuration.

It was left in the file named:
        '/****/*****/.sage/ipython-5.0.0/Sage_crash_report.txt'
If you can email this file to the developers, the information in it will help
them in understanding and correcting the problem.

You can mail it to: sage-support at sage-support@googlegroups.com
with the subject 'Sage Crash Report'.

If you want to do it now, the following command will work (under Unix):
mail -s 'Sage Crash Report' sage-support@googlegroups.com < 
/****/*****/.sage/ipython-5.0.0/Sage_crash_report.txt

In your email, please also include information about:
- The operating system under which the crash happened: Linux, macOS, Windows,
  other, and which exact version (for example: Ubuntu 16.04.3, macOS 10.13.2,
  Windows 10 Pro), and whether it is 32-bit or 64-bit;
- How Sage was installed: using pip or conda, from GitHub, as part of
  a Docker container, or other, providing more detail if possible;
- How to reproduce the crash: what exact sequence of instructions can one
  input to get the same crash? Ideally, find a minimal yet complete sequence
  of instructions that yields the crash.

To ensure accurate tracking of this issue, please file a report about it at:
http://trac.sagemath.org

Hit <Enter> to quit (your terminal may close):
(sage) d****@****** ~ $ 

***************************************************************************

IPython post-mortem report

{'commit_hash': u'033ab93c7',
 'commit_source': 'installation',
 'default_encoding': 'UTF-8',
 'ipython_path': 
'/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/IPython',
 'ipython_version': '5.8.0',
 'os_name': 'posix',
 'platform': 'Linux-4.15.0-45-generic-x86_64-with-debian-buster-sid',
 'sys_executable': '/***/******//miniconda3/envs/sage/bin/python',
 'sys_platform': 'linux2',
 'sys_version': '2.7.14 | packaged by conda-forge | (default, Dec  9 2017, 
16:18:43) \n[GCC 4.8.2 20140120 (Red Hat 4.8.2-15)]'}

***************************************************************************



***************************************************************************

Crash traceback:

---------------------------------------------------------------------------
---------------------------------------------------------------------------
ImportError   Python 2.7.14: /***/******//miniconda3/envs/sage/bin/python
                                                   Tue Feb 19 18:06:21 2019
A problem occurred executing Python code.  Here is the sequence of function
calls leading up to the error, with the most recent (innermost) call last.
/***/******//miniconda3/envs/sage/bin/sage-ipython in <module>()
      1 #!/***/******//miniconda3/envs/sage/bin/python
      2 # -*- coding: utf-8 -*-
      3 """
      4 Sage IPython startup script.
      5 """
      6 
      7 from sage.repl.interpreter import SageTerminalApp
      8 
      9 app = SageTerminalApp.instance()
---> 10 app.initialize()
        global app.initialize = <bound method SageTerminalApp.initialize of 
<sage.repl.interpreter.SageTerminalApp object at 0x7f9c21a4e090>>
     11 app.start()

</***/******//miniconda3/envs/sage/lib/python2.7/site-packages/decorator.pyc:decorator-gen-110>
 in initialize(self=<sage.repl.interpreter.SageTerminalApp object>, argv=None)

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/traitlets/config/application.pyc
 in catch_config_error(method=<function initialize>, 
app=<sage.repl.interpreter.SageTerminalApp object>, *args=(None,), **kwargs={})
     72     TRAITLETS_APPLICATION_RAISE_CONFIG_FILE_ERROR = False
     73 else:
     74     raise ValueError("Unsupported value for environment variable: 
'TRAITLETS_APPLICATION_RAISE_CONFIG_FILE_ERROR' is set to '%s' which is none of 
 {'0', '1', 'false', 'true', ''}."% _envvar )
     75 
     76 
     77 @decorator
     78 def catch_config_error(method, app, *args, **kwargs):
     79     """Method decorator for catching invalid config 
(Trait/ArgumentErrors) during init.
     80 
     81     On a TraitError (generally caused by bad config), this will print 
the trait's
     82     message, and exit the app.
     83 
     84     For use on init methods, to prevent invoking excepthook on invalid 
input.
     85     """
     86     try:
---> 87         return method(app, *args, **kwargs)
        method = <function initialize at 0x7f9c1b12a140>
        app = <sage.repl.interpreter.SageTerminalApp object at 0x7f9c21a4e090>
        args = (None,)
        kwargs = {}
     88     except (TraitError, ArgumentError) as e:
     89         app.print_help()
     90         app.log.fatal("Bad config encountered during initialization:")
     91         app.log.fatal(str(e))
     92         app.log.debug("Config at the time: %s", app.config)
     93         app.exit(1)
     94 
     95 
     96 class ApplicationError(Exception):
     97     pass
     98 
     99 
    100 class LevelFormatter(logging.Formatter):
    101     """Formatter with additional `highlevel` record
    102 

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/IPython/terminal/ipapp.pyc
 in initialize(self=<sage.repl.interpreter.SageTerminalApp object>, argv=None)
    301 
    302         return super(TerminalIPythonApp, self).parse_command_line(argv)
    303     
    304     @catch_config_error
    305     def initialize(self, argv=None):
    306         """Do actions after construct, but before starting the app."""
    307         super(TerminalIPythonApp, self).initialize(argv)
    308         if self.subapp is not None:
    309             # don't bother initializing further, starting subapp
    310             return
    311         # print self.extra_args
    312         if self.extra_args and not self.something_to_run:
    313             self.file_to_run = self.extra_args[0]
    314         self.init_path()
    315         # create the shell
--> 316         self.init_shell()
        self.init_shell = <bound method SageTerminalApp.init_shell of 
<sage.repl.interpreter.SageTerminalApp object at 0x7f9c21a4e090>>
    317         # and draw the banner
    318         self.init_banner()
    319         # Now a variety of things that happen after the banner is 
printed.
    320         self.init_gui_pylab()
    321         self.init_extensions()
    322         self.init_code()
    323 
    324     def init_shell(self):
    325         """initialize the InteractiveShell instance"""
    326         # Create an InteractiveShell instance.
    327         # shell.display_banner should always be False for the terminal
    328         # based app, because we call shell.show_banner() by hand below
    329         # so the banner shows *before* all extension loading stuff.
    330         self.shell = self.interactive_shell_class.instance(parent=self,
    331                         profile_dir=self.profile_dir,

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/repl/interpreter.pyc
 in init_shell(self=<sage.repl.interpreter.SageTerminalApp object>)
    747         self.shell.has_sage_extensions = SAGE_EXTENSION in 
self.extensions
    748 
    749         # Load the %lprun extension if available
    750         try:
    751             import line_profiler
    752         except ImportError:
    753             pass
    754         else:
    755             self.extensions.append('line_profiler')
    756 
    757         if self.shell.has_sage_extensions:
    758             self.extensions.remove(SAGE_EXTENSION)
    759 
    760             # load sage extension here to get a crash if
    761             # something is wrong with the sage library
--> 762             self.shell.extension_manager.load_extension(SAGE_EXTENSION)
        self.shell.extension_manager.load_extension = <bound method 
ExtensionManager.load_extension of <IPython.core.extensions.ExtensionManager 
object at 0x7f9c1a34dcd0>>
        global SAGE_EXTENSION = 'sage'
    763 
    764 

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/IPython/core/extensions.pyc
 in load_extension(self=<IPython.core.extensions.ExtensionManager object>, 
module_str='sage')
     70 
     71         Returns the string "already loaded" if the extension is already 
loaded,
     72         "no load function" if the module doesn't have a 
load_ipython_extension
     73         function, or None if it succeeded.
     74         """
     75         if module_str in self.loaded:
     76             return "already loaded"
     77         
     78         from IPython.utils.syspathcontext import prepended_to_syspath
     79         
     80         with self.shell.builtin_trap:
     81             if module_str not in sys.modules:
     82                 with prepended_to_syspath(self.ipython_extension_dir):
     83                     __import__(module_str)
     84             mod = sys.modules[module_str]
---> 85             if self._call_load_ipython_extension(mod):
        self._call_load_ipython_extension = <bound method 
ExtensionManager._call_load_ipython_extension of 
<IPython.core.extensions.ExtensionManager object at 0x7f9c1a34dcd0>>
        mod = <module 'sage' from 
'/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/__init__.pyc'>
     86                 self.loaded.add(module_str)
     87             else:
     88                 return "no load function"
     89 
     90     def unload_extension(self, module_str):
     91         """Unload an IPython extension by its module name.
     92 
     93         This function looks up the extension's name in ``sys.modules`` 
and
     94         simply calls ``mod.unload_ipython_extension(self)``.
     95         
     96         Returns the string "no unload function" if the extension 
doesn't define
     97         a function to unload itself, "not loaded" if the extension 
isn't loaded,
     98         otherwise None.
     99         """
    100         if module_str not in self.loaded:

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/IPython/core/extensions.pyc
 in _call_load_ipython_extension(self=<IPython.core.extensions.ExtensionManager 
object>, mod=<module 'sage' from 
'/***/******//miniconda3/e...e/lib/python2.7/site-packages/sage/__init__.pyc'>)
    117         """
    118         from IPython.utils.syspathcontext import prepended_to_syspath
    119 
    120         if (module_str in self.loaded) and (module_str in sys.modules):
    121             self.unload_extension(module_str)
    122             mod = sys.modules[module_str]
    123             with prepended_to_syspath(self.ipython_extension_dir):
    124                 reload(mod)
    125             if self._call_load_ipython_extension(mod):
    126                 self.loaded.add(module_str)
    127         else:
    128             self.load_extension(module_str)
    129 
    130     def _call_load_ipython_extension(self, mod):
    131         if hasattr(mod, 'load_ipython_extension'):
--> 132             mod.load_ipython_extension(self.shell)
        mod.load_ipython_extension = <function load_ipython_extension at 
0x7f9c21a41938>
        self.shell = <sage.repl.interpreter.SageTerminalInteractiveShell object 
at 0x7f9c1b0caa10>
    133             return True
    134 
    135     def _call_unload_ipython_extension(self, mod):
    136         if hasattr(mod, 'unload_ipython_extension'):
    137             mod.unload_ipython_extension(self.shell)
    138             return True
    139 
    140     def install_extension(self, url, filename=None):
    141         """Download and install an IPython extension. 
    142 
    143         If filename is given, the file will be so named (inside the 
extension
    144         directory). Otherwise, the name from the URL will be used. The 
file must
    145         have a .py or .zip extension; otherwise, a ValueError will be 
raised.
    146 
    147         Returns the full path to the installed file.

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/__init__.pyc 
in 
load_ipython_extension(*args=(<sage.repl.interpreter.SageTerminalInteractiveShell
 object>,))
      1 __all__ = ['all']
      2 
      3 # IPython calls this when starting up
      4 def load_ipython_extension(*args):
      5     import sage.repl.ipython_extension
----> 6     sage.repl.ipython_extension.load_ipython_extension(*args)
        sage.repl.ipython_extension.load_ipython_extension = <function 
load_ipython_extension at 0x7f9c1a1048c0>
        args = (<sage.repl.interpreter.SageTerminalInteractiveShell object at 
0x7f9c1b0caa10>,)

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/repl/ipython_extension.pyc
 in wrapper(*args=(<sage.repl.interpreter.SageTerminalInteractiveShell 
object>,), **kwargs={})
    490         ....:     if work:
    491         ....:         return 'foo worked'
    492         ....:     raise RuntimeError("foo didn't work")
    493         sage: foo(False)
    494         Traceback (most recent call last):
    495         ...
    496         RuntimeError: foo didn't work
    497         sage: foo(True)
    498         'foo worked'
    499         sage: foo(False)
    500         sage: foo(True)
    501     """
    502     @wraps(func)
    503     def wrapper(*args, **kwargs):
    504         if not wrapper.has_run:
--> 505             result = func(*args, **kwargs)
        result = undefined
        global func = undefined
        args = (<sage.repl.interpreter.SageTerminalInteractiveShell object at 
0x7f9c1b0caa10>,)
        kwargs = {}
    506             wrapper.has_run = True
    507             return result
    508     wrapper.has_run = False
    509     return wrapper
    510 
    511 
    512 @run_once
    513 def load_ipython_extension(ip):
    514     """
    515     Load the extension in IPython.
    516     """
    517     # this modifies ip
    518     SageCustomizations(shell=ip)

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/repl/ipython_extension.pyc
 in 
load_ipython_extension(ip=<sage.repl.interpreter.SageTerminalInteractiveShell 
object>)
    503     def wrapper(*args, **kwargs):
    504         if not wrapper.has_run:
    505             result = func(*args, **kwargs)
    506             wrapper.has_run = True
    507             return result
    508     wrapper.has_run = False
    509     return wrapper
    510 
    511 
    512 @run_once
    513 def load_ipython_extension(ip):
    514     """
    515     Load the extension in IPython.
    516     """
    517     # this modifies ip
--> 518     SageCustomizations(shell=ip)
        global SageCustomizations = <class 
'sage.repl.ipython_extension.SageCustomizations'>
        global shell = undefined
        ip = <sage.repl.interpreter.SageTerminalInteractiveShell object at 
0x7f9c1b0caa10>

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/repl/ipython_extension.pyc
 in __init__(self=<sage.repl.ipython_extension.SageCustomizations object>, 
shell=<sage.repl.interpreter.SageTerminalInteractiveShell object>)
    361     def __init__(self, shell=None):
    362         """
    363         Initialize the Sage plugin.
    364         """
    365         self.shell = shell
    366 
    367         self.auto_magics = SageMagics(shell)
    368         self.shell.register_magics(self.auto_magics)
    369 
    370         import sage.misc.edit_module as edit_module
    371         self.shell.set_hook('editor', edit_module.edit_devel)
    372 
    373         self.init_inspector()
    374         self.init_line_transforms()
    375 
--> 376         import sage.all # until sage's import hell is fixed
        sage.all = undefined
    377 
    378         self.shell.verbose_quit = True
    379         self.set_quit_hook()
    380 
    381         self.register_interface_magics()
    382 
    383         if SAGE_IMPORTALL == 'yes':
    384             self.init_environment()
    385 
    386     def register_interface_magics(self):
    387         """
    388         Register magics for each of the Sage interfaces
    389         """
    390         from sage.repl.interface_magic import InterfaceMagic
    391         InterfaceMagic.register_all(self.shell)

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/all.py in 
<module>()
     88 
     89 from time                import sleep
     90 
     91 import sage.misc.lazy_import
     92 from sage.misc.all       import *         # takes a while
     93 from sage.typeset.all    import *
     94 from sage.repl.all       import *
     95 
     96 from sage.misc.sh import sh
     97 
     98 from sage.libs.all       import *
     99 from sage.data_structures.all import *
    100 from sage.doctest.all    import *
    101 
    102 from sage.structure.all  import *
--> 103 from sage.rings.all      import *
        global sage.rings.all = undefined
    104 from sage.arith.all      import *
    105 from sage.matrix.all     import *
    106 
    107 from sage.symbolic.all   import *
    108 from sage.modules.all    import *
    109 from sage.monoids.all    import *
    110 from sage.algebras.all   import *
    111 from sage.modular.all    import *
    112 from sage.sat.all        import *
    113 from sage.schemes.all    import *
    114 from sage.graphs.all     import *
    115 from sage.groups.all     import *
    116 from sage.databases.all  import *
    117 from sage.categories.all import *
    118 from sage.sets.all       import *

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/rings/all.py 
in <module>()
     39 
     40 # Rational numbers
     41 from .rational_field import RationalField, QQ
     42 from .rational import Rational
     43 Rationals = RationalField
     44 
     45 # Integers modulo n.
     46 from sage.rings.finite_rings.integer_mod_ring import IntegerModRing, 
Zmod
     47 from sage.rings.finite_rings.integer_mod import IntegerMod, Mod, mod
     48 Integers = IntegerModRing
     49 
     50 # Finite fields
     51 from .finite_rings.all import *
     52 
     53 # Number field
---> 54 from .number_field.all import *
        global number_field.all = undefined
     55 
     56 # Function field
     57 from .function_field.all import *
     58 
     59 # Finite residue fields
     60 from .finite_rings.residue_field import ResidueField
     61 
     62 # p-adic field
     63 from .padics.all import *
     64 from .padics.padic_printing import _printer_defaults as padic_printing
     65 
     66 # Semirings
     67 from .semirings.all import *
     68 
     69 # Real numbers

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/rings/number_field/all.py
 in <module>()
      1 from __future__ import absolute_import
      2 
      3 from .number_field import (NumberField, NumberFieldTower, 
CyclotomicField, QuadraticField,
      4                           is_fundamental_discriminant)
      5 from .number_field_element import NumberFieldElement
      6 
      7 from .order import EquationOrder, GaussianIntegers, EisensteinIntegers
      8 
----> 9 from .totallyreal import enumerate_totallyreal_fields_prim
        global totallyreal = undefined
        global enumerate_totallyreal_fields_prim = undefined
     10 from .totallyreal_data import hermite_constant
     11 from .totallyreal_rel import enumerate_totallyreal_fields_all, 
enumerate_totallyreal_fields_rel
     12 
     13 from .unit_group import UnitGroup

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/rings/number_field/totallyreal_data.pxd
 in init sage.rings.number_field.totallyreal 
(/feedstock_root/build_artefacts/sagelib_1496649974235/work/sage-7.6/build/cythonized/sage/rings/number_field/totallyreal.c:12569)()
      1 cdef double eval_seq_as_poly(int *f, int n, double x)
      2 cdef double newton(int *f, int *df, int n, double x0, double eps)
      3 cdef void newton_in_intervals(int *f, int *df, int n, double *beta, 
double eps, double *rts)
      4 cpdef lagrange_degree_3(int n, int an1, int an2, int an3)
      5 
      6 cimport sage.rings.integer
      7 
      8 cdef int eval_seq_as_poly_int(int *f, int n, int x)
      9 
     10 cdef int easy_is_irreducible(int *a, int n)
     11 
---> 12 cdef class tr_data:
        global cdef = undefined
        global tr_data = undefined
     13 
     14     cdef int n, k
     15     cdef double B
     16     cdef double b_lower, b_upper, gamma
     17 
     18     cdef int *a
     19     cdef int *amax
     20     cdef double *beta
     21     cdef int *gnk
     22 
     23     cdef int *df
     24 
     25     cdef void incr(self, int *f_out, int verbose, int haltk, int phc)
     26 

sage/rings/number_field/totallyreal_data.pyx in init 
sage.rings.number_field.totallyreal_data 
(/feedstock_root/build_artefacts/sagelib_1496649974235/work/sage-7.6/build/cythonized/sage/rings/number_field/totallyreal_data.c:13278)()

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/rings/polynomial/polynomial_ring_constructor.pyc
 in PolynomialRing(base_ring=Integer Ring, arg1='x', arg2=None, sparse=False, 
order='degrevlex', names=None, name='x', var_array=None, implementation=None)
    446         arg2 = [str(x) for x in arg2]
    447     if isinstance(arg2, (int, long, Integer)):
    448         # 3. PolynomialRing(base_ring, names, n, order='degrevlex'):
    449         if not isinstance(arg1, (list, tuple, str)):
    450             raise TypeError("You *must* specify the names of the 
variables.")
    451         n = int(arg2)
    452         names = arg1
    453         R = _multi_variate(base_ring, names, n, sparse, order, 
implementation)
    454 
    455     elif isinstance(arg1, str) or (isinstance(arg1, (list,tuple)) and 
len(arg1) == 1):
    456         if not ',' in arg1:
    457             # 1. PolynomialRing(base_ring, name, sparse=False):
    458             if not arg2 is None:
    459                 raise TypeError("if second arguments is a string with 
no commas, then there must be no other non-optional arguments")
    460             name = arg1
--> 461             R = _single_variate(base_ring, name, sparse, implementation)
        R = None
        global _single_variate = <function _single_variate at 0x7f9afd826cf8>
        base_ring = Integer Ring
        name = 'x'
        sparse = False
        implementation = None
    462         else:
    463             # 2-4. PolynomialRing(base_ring, names, order='degrevlex'):
    464             if not arg2 is None:
    465                 raise TypeError("invalid input to PolynomialRing 
function; please see the docstring for that function")
    466             names = arg1.split(',')
    467             R = _multi_variate(base_ring, names, -1, sparse, order, 
implementation)
    468     elif isinstance(arg1, (list, tuple)):
    469             # PolynomialRing(base_ring, names (list or tuple), 
order='degrevlex'):
    470             names = arg1
    471             R = _multi_variate(base_ring, names, -1, sparse, order, 
implementation)
    472 
    473     if arg1 is None and arg2 is None:
    474         raise TypeError("you *must* specify the indeterminates (as not 
None).")
    475     if R is None:
    476         raise TypeError("invalid input (%s, %s, %s) to PolynomialRing 
function; please see the docstring for that function"%(

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/rings/polynomial/polynomial_ring_constructor.pyc
 in _single_variate(base_ring=Integer Ring, name=('x',), sparse=False, 
implementation=None)
    524             R = 
m.PolynomialRing_dense_padic_ring_capped_absolute(base_ring, name)
    525 
    526         elif isinstance(base_ring, padic_base_leaves.pAdicRingFixedMod):
    527             R = m.PolynomialRing_dense_padic_ring_fixed_mod(base_ring, 
name)
    528 
    529         elif base_ring in _CompleteDiscreteValuationRings:
    530             R = m.PolynomialRing_cdvr(base_ring, name, sparse)
    531 
    532         elif base_ring in _CompleteDiscreteValuationFields:
    533             R = m.PolynomialRing_cdvf(base_ring, name, sparse)
    534 
    535         elif base_ring.is_field(proof = False):
    536             R = m.PolynomialRing_field(base_ring, name, sparse)
    537 
    538         elif base_ring.is_integral_domain(proof = False):
--> 539             R = m.PolynomialRing_integral_domain(base_ring, name, 
sparse, implementation)
        R = None
        m.PolynomialRing_integral_domain = <class 
'sage.rings.polynomial.polynomial_ring.PolynomialRing_integral_domain'>
        base_ring = Integer Ring
        name = ('x',)
        sparse = False
        implementation = None
    540         else:
    541             R = m.PolynomialRing_commutative(base_ring, name, sparse)
    542     else:
    543         R = m.PolynomialRing_general(base_ring, name, sparse)
    544 
    545     if hasattr(R, '_implementation_names'):
    546         for name in R._implementation_names:
    547             real_key = key[0:3] + (name,)
    548             _save_in_cache(real_key, R)
    549     else:
    550         _save_in_cache(key, R)
    551     return R
    552 
    553 def _multi_variate(base_ring, names, n, sparse, order, implementation):
    554 #    if not sparse:

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/rings/polynomial/polynomial_ring.pyc
 in __init__(self=Univariate Polynomial Ring in x over Integer Ring, 
base_ring=Integer Ring, name=('x',), sparse=False, implementation=None, 
element_class=<type 
'sage.rings.polynomial.polynomial_integer_dense_flint.Polynomial_integer_dense_flint'>,
 category=None)
   1588             if is_IntegerRing(base_ring) and not sparse:
   1589                 if implementation == 'NTL':
   1590                     from 
sage.rings.polynomial.polynomial_integer_dense_ntl \
   1591                             import Polynomial_integer_dense_ntl
   1592                     element_class = Polynomial_integer_dense_ntl
   1593                     self._implementation_names = ('NTL',)
   1594                     self._implementation_repr = ' (using NTL)'
   1595                 elif implementation == 'FLINT' or implementation is 
None:
   1596                     from 
sage.rings.polynomial.polynomial_integer_dense_flint \
   1597                             import Polynomial_integer_dense_flint
   1598                     element_class = Polynomial_integer_dense_flint
   1599                     self._implementation_names = (None, 'FLINT')
   1600                 else:
   1601                     raise ValueError("Unknown implementation %s for 
ZZ[x]"%implementation)
   1602         PolynomialRing_commutative.__init__(self, base_ring, name=name,
-> 1603                 sparse=sparse, element_class=element_class, 
category=category)
        sparse = False
        element_class = <type 
'sage.rings.polynomial.polynomial_integer_dense_flint.Polynomial_integer_dense_flint'>
        category = None
   1604 
   1605     def _repr_(self):
   1606         """
   1607         TESTS::
   1608 
   1609             sage: from sage.rings.polynomial.polynomial_ring import 
PolynomialRing_integral_domain as PRing
   1610             sage: R = PRing(ZZ, 'x', implementation='NTL'); R
   1611             Univariate Polynomial Ring in x over Integer Ring (using 
NTL)
   1612         """
   1613         s = PolynomialRing_commutative._repr_(self)
   1614         return s + self._implementation_repr
   1615 
   1616 
   1617 class PolynomialRing_field(PolynomialRing_integral_domain,
   1618                            PolynomialRing_singular_repr,

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/rings/polynomial/polynomial_ring.pyc
 in __init__(self=Univariate Polynomial Ring in x over Integer Ring, 
base_ring=Integer Ring, name=('x',), sparse=False, element_class=<type 
'sage.rings.polynomial.polynomial_integer_dense_flint.Polynomial_integer_dense_flint'>,
 category=Join of Category of unique factorization domains...s and infinite 
enumerated sets and metric spaces))
   1459         if max_degree is not None and of_degree is None:
   1460             return self._monics_max( max_degree )
   1461         raise ValueError("you should pass exactly one of of_degree and 
max_degree")
   1462 
   1463 class PolynomialRing_commutative(PolynomialRing_general, 
commutative_algebra.CommutativeAlgebra):
   1464     """
   1465     Univariate polynomial ring over a commutative ring.
   1466     """
   1467     def __init__(self, base_ring, name=None, sparse=False, 
element_class=None, category=None):
   1468         if base_ring not in _CommutativeRings:
   1469             raise TypeError("Base ring %s must be a commutative 
ring."%repr(base_ring))
   1470         # We trust that, if a category is given, that it is useful.
   1471         if category is None:
   1472             category = 
polynomial_default_category(base_ring.category(),False)
   1473         PolynomialRing_general.__init__(self, base_ring, name=name,
-> 1474                 sparse=sparse, element_class=element_class, 
category=category)
        sparse = False
        element_class = <type 
'sage.rings.polynomial.polynomial_integer_dense_flint.Polynomial_integer_dense_flint'>
        category = Join of Category of unique factorization domains and 
Category of commutative algebras over (euclidean domains and infinite 
enumerated sets and metric spaces)
   1475 
   1476     def quotient_by_principal_ideal(self, f, names=None):
   1477         """
   1478         Return the quotient of this polynomial ring by the principal
   1479         ideal (generated by) `f`.
   1480 
   1481         INPUT:
   1482 
   1483         - ``f`` - either a polynomial in ``self``, or a principal
   1484           ideal of ``self``.
   1485 
   1486         EXAMPLES::
   1487 
   1488             sage: R.<x> = QQ[]
   1489             sage: I = (x^2-1)*R

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/rings/polynomial/polynomial_ring.pyc
 in __init__(self=Univariate Polynomial Ring in x over Integer Ring, 
base_ring=Integer Ring, name=('x',), sparse=False, element_class=<type 
'sage.rings.polynomial.polynomial_integer_dense_flint.Polynomial_integer_dense_flint'>,
 category=Join of Category of unique factorization domains...s and infinite 
enumerated sets and metric spaces))
    275         self._has_singular = False
    276         # Algebra.__init__ also calls __init_extra__ of 
Algebras(...).parent_class, which
    277         # tries to provide a conversion from the base ring, if it does 
not exist.
    278         # This is for algebras that only do the generic stuff in their 
initialisation.
    279         # But the attribute _no_generic_basering_coercion prevents that 
from happening,
    280         # since we want to use PolynomialBaseringInjection.
    281         sage.algebras.algebra.Algebra.__init__(self, base_ring, 
names=name, normalize=True, category=category)
    282         self.__generator = self.element_class(self, [0,1], is_gen=True)
    283         self._populate_coercion_lists_(
    284                 #coerce_list = [base_inject],
    285                 #convert_list = [list, base_inject],
    286                 convert_method_name = '_polynomial_')
    287         if is_PolynomialRing(base_ring):
    288             self._Karatsuba_threshold = 0
    289         else:
--> 290             from sage.matrix.matrix_space import MatrixSpace
        global sage.matrix.matrix_space = undefined
        MatrixSpace = undefined
    291             if isinstance(base_ring, MatrixSpace):
    292                 self._Karatsuba_threshold = 0
    293             else:
    294                 self._Karatsuba_threshold = 8
    295 
    296     def __reduce__(self):
    297         import sage.rings.polynomial.polynomial_ring_constructor
    298         return 
(sage.rings.polynomial.polynomial_ring_constructor.PolynomialRing,
    299                 (self.base_ring(), self.variable_name(), None, 
self.is_sparse()))
    300 
    301 
    302     def _element_constructor_(self, x=None, check=True, is_gen=False,
    303                               construct=False, **kwds):
    304         r"""
    305         Convert ``x`` into this univariate polynomial ring,

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/matrix/matrix_space.pyc
 in <module>()
     33 
#*****************************************************************************
     34 from __future__ import print_function, absolute_import
     35 from six.moves import range
     36 from six import iteritems
     37 
     38 # System imports
     39 import sys
     40 import types
     41 import operator
     42 
     43 # Sage matrix imports
     44 from . import matrix
     45 from . import matrix_generic_dense
     46 from . import matrix_generic_sparse
     47 
---> 48 from . import matrix_modn_sparse
        global matrix_modn_sparse = undefined
     49 
     50 from . import matrix_mod2_dense
     51 from . import matrix_gf2e_dense
     52 
     53 from . import matrix_integer_dense
     54 from . import matrix_integer_sparse
     55 
     56 from . import matrix_rational_dense
     57 from . import matrix_rational_sparse
     58 
     59 from . import matrix_polynomial_dense
     60 from . import matrix_mpolynomial_dense
     61 
     62 # Sage imports
     63 from sage.misc.superseded import deprecation

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/matrix/matrix_integer_dense.pxd
 in init sage.matrix.matrix_modn_sparse 
(/feedstock_root/build_artefacts/sagelib_1496649974235/work/sage-7.6/build/cythonized/sage/matrix/matrix_modn_sparse.c:15049)()
      1 from sage.libs.gmp.types cimport *
      2 from sage.libs.flint.types cimport fmpz_mat_t
      3 
      4 from .matrix_dense cimport Matrix_dense
      5 from sage.rings.integer cimport Integer
      6 from sage.ext.mod_int cimport *
      7 
      8 ctypedef long* GEN
      9 
---> 10 cdef class Matrix_integer_dense(Matrix_dense):
        global cdef = undefined
        global Matrix_integer_dense = undefined
        global Matrix_dense = undefined
     11     cdef fmpz_mat_t _matrix  # Always initialized in __cinit__
     12     cdef bint _initialized_mpz
     13     cdef mpz_t * _entries    # Only used if _initialized_mpz
     14     cdef mpz_t ** _rows      # Only used if _initialized_mpz
     15     cdef object _pivots
     16     cdef int mpz_height(self, mpz_t height) except -1
     17     cdef _mod_int_c(self, mod_int modulus)
     18     cdef _mod_two(self)
     19     cdef _pickle_version0(self)
     20     cdef _unpickle_version0(self, data)
     21     cpdef _export_as_string(self, int base=?)
     22     cdef inline int _init_mpz(self) except -1
     23     cdef int _init_mpz_impl(self) except -1
     24     cdef inline int _init_linbox(self) except -1
     25     cdef void _dealloc_mpz(self)
     26     cdef void set_unsafe_mpz(self, Py_ssize_t i, Py_ssize_t j, const 
mpz_t value)
     27     cdef void set_unsafe_si(self, Py_ssize_t i, Py_ssize_t j, long 
value)
     28     cdef void set_unsafe_double(self, Py_ssize_t i, Py_ssize_t j, 
double value)
     29     cdef inline void get_unsafe_mpz(self, Py_ssize_t i, Py_ssize_t j, 
mpz_t value)
     30     cdef inline double get_unsafe_double(self, Py_ssize_t i, Py_ssize_t 
j)
     31 

/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/matrix/matrix_modn_dense_template_header.pxi
 in init sage.matrix.matrix_integer_dense 
(/feedstock_root/build_artefacts/sagelib_1496649974235/work/sage-7.6/build/cythonized/sage/matrix/matrix_integer_dense.c:57312)()
      1 """
      2 Dense Matrix Template for C/C++ Library Interfaces
      3 """
      4 
      5 from sage.ext.mod_int cimport *
      6 from sage.matrix.matrix_dense cimport Matrix_dense
      7 
----> 8 cdef class Matrix_modn_dense_template(Matrix_dense):
        global cdef = undefined
        global Matrix_modn_dense_template = undefined
        global Matrix_dense = undefined
      9     cdef celement **_matrix
     10     cdef celement *_entries
     11     cdef mod_int p
     12     cdef xgcd_eliminate (self, celement * row1, celement* row2, 
Py_ssize_t start_col)
     13     cdef set_unsafe_int(self, Py_ssize_t i, Py_ssize_t j, int value)
     14     cpdef _export_as_string(self)
     15     cdef int _copy_row_to_mod_int_array(self, mod_int *to, Py_ssize_t i)

ImportError: 
/***/******//miniconda3/envs/sage/lib/python2.7/site-packages/sage/matrix/../../../../liblinboxsage.so.0:
 undefined symbol: _ZNK6Givaro7IntegercvSsEv

***************************************************************************

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*** Last line of input (may not be in above history):

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