On Sat, Jun 15, 2013 at 2:03 PM, Warren Weckesser < warren.weckes...@gmail.com> wrote:
> > On Sat, Jun 15, 2013 at 3:57 PM, Warren Weckesser < > warren.weckes...@gmail.com> wrote: > >> >> On Sat, Jun 15, 2013 at 3:15 PM, Julian Taylor < >> jtaylor.deb...@googlemail.com> wrote: >> >>> On 15.06.2013 21:12, Charles R Harris wrote: >>> > >>> > >>> > On Sat, Jun 15, 2013 at 9:50 AM, Warren Weckesser >>> > <warren.weckes...@gmail.com <mailto:warren.weckes...@gmail.com>> >>> wrote: >>> > >>> > >>> > On Sat, Jun 15, 2013 at 11:43 AM, Warren Weckesser >>> > <warren.weckes...@gmail.com <mailto:warren.weckes...@gmail.com>> >>> wrote: >>> > >>> > I'm getting a seg. fault in master when I run the tests. I'm >>> on >>> > Ubuntu 12.04 64 bit, with Python 3.3.2 (64 bits): >>> > >>> > $ python3 -c "import numpy as np; np.test('full')" >>> > Running unit tests for numpy >>> > NumPy version 1.8.0.dev-fa5bc1c >>> > NumPy is installed in >>> > /home/warren/local_py332/lib/python3.3/site-packages/numpy >>> > Python version 3.3.2 (default, Jun 14 2013, 12:12:22) [GCC >>> 4.6.3] >>> > nose version 1.3.0 >>> > >>> .............................S.........................................................................................................................................................S.......................................................................................................................................................S.................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... >>> ......... >>> >>> .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................K............................................................................................................................................................................................SSS. >>> ......... >>> >>> .......................................................................................K.....................................................................................................................................................................................Segmentation >>> > fault >>> > >>> > The seg. fault is occurring in ma/tests/test_mrecords.py: >>> > >>> > $ nosetests test_mrecords.py >>> > .Segmentation fault >>> > >>> > More info: >>> > >>> > $ python3 >>> > Python 3.3.2 (default, Jun 14 2013, 12:12:22) >>> > [GCC 4.6.3] on linux >>> > Type "help", "copyright", "credits" or "license" for more >>> > information. >>> > >>> import numpy as np >>> > >>> np.show_config() >>> > atlas_threads_info: >>> > library_dirs = ['/usr/lib/atlas-base/atlas', >>> > '/usr/lib/atlas-base'] >>> > include_dirs = ['/usr/include/atlas'] >>> > language = f77 >>> > libraries = ['lapack', 'ptf77blas', 'ptcblas', 'atlas'] >>> > define_macros = [('ATLAS_INFO', '"\\"3.8.4\\""')] >>> > atlas_blas_threads_info: >>> > library_dirs = ['/usr/lib/atlas-base'] >>> > include_dirs = ['/usr/include/atlas'] >>> > language = c >>> > libraries = ['ptf77blas', 'ptcblas', 'atlas'] >>> > define_macros = [('ATLAS_INFO', '"\\"3.8.4\\""')] >>> > mkl_info: >>> > NOT AVAILABLE >>> > lapack_opt_info: >>> > library_dirs = ['/usr/lib/atlas-base/atlas', >>> > '/usr/lib/atlas-base'] >>> > include_dirs = ['/usr/include/atlas'] >>> > language = f77 >>> > libraries = ['lapack', 'ptf77blas', 'ptcblas', 'atlas'] >>> > define_macros = [('ATLAS_INFO', '"\\"3.8.4\\""')] >>> > blas_opt_info: >>> > library_dirs = ['/usr/lib/atlas-base'] >>> > include_dirs = ['/usr/include/atlas'] >>> > language = c >>> > libraries = ['ptf77blas', 'ptcblas', 'atlas'] >>> > define_macros = [('ATLAS_INFO', '"\\"3.8.4\\""')] >>> > lapack_mkl_info: >>> > NOT AVAILABLE >>> > blas_mkl_info: >>> > NOT AVAILABLE >>> > >>> >>> > >>> > gdb: >>> > >>> > $ gdb python3 >>> > GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2.1) 7.4-2012.04 >>> > Copyright (C) 2012 Free Software Foundation, Inc. >>> > License GPLv3+: GNU GPL version 3 or later >>> > <http://gnu.org/licenses/gpl.html> >>> > This is free software: you are free to change and redistribute >>> it. >>> > There is NO WARRANTY, to the extent permitted by law. Type >>> > "show copying" >>> > and "show warranty" for details. >>> > This GDB was configured as "x86_64-linux-gnu". >>> > For bug reporting instructions, please see: >>> > <http://bugs.launchpad.net/gdb-linaro/>... >>> > Reading symbols from >>> /home/warren/local_py332/bin/python3...done. >>> > (gdb) run test_mrecords.py >>> > Starting program: /home/warren/local_py332/bin/python3 >>> > test_mrecords.py >>> > [Thread debugging using libthread_db enabled] >>> > Using host libthread_db library >>> > "/lib/x86_64-linux-gnu/libthread_db.so.1". >>> > . >>> > Program received signal SIGSEGV, Segmentation fault. >>> > 0x00007ffff5f080a4 in >>> > _aligned_strided_to_contig_size8_srcstride0 (dst=<optimized >>> out>, >>> > dst_stride=<optimized out>, src=<optimized out>, >>> > __NPY_UNUSED_TAGGEDsrc_stride=<optimized out>, >>> > N=<optimized out>, >>> > __NPY_UNUSED_TAGGEDsrc_itemsize=<optimized out>, >>> > __NPY_UNUSED_TAGGEDdata=0x0) >>> > at >>> numpy/core/src/multiarray/lowlevel_strided_loops.c.src:190 >>> > 190 *((@type@ *)dst) = temp; >>> > (gdb) >>> > >>> > >>> > >>> > >>> > Is this repeatable? Just asking as I don't see that here with gcc >>> 4.7.2. >>> > Looks like Julian's changes to lowlevel_strided_loops may be >>> responsible. >>> > >>> > Chuck >>> > >>> >>> I can't reproduce it on ubuntu 12.04 with python 3.2 (don't have 3.3.2) >>> the changes made are very minimal, from looking at them again I don't >>> see how they could cause this (especially on a x86 platform). >>> >>> @warren, can you please bisect the commit causing this? >>> >> >> >> Here's the culprit: >> >> aef286debfd11a62f1c337dea55624cee7fd4d9e is the first bad commit >> commit aef286debfd11a62f1c337dea55624cee7fd4d9e >> Author: Julian Taylor <jtaylor.deb...@googlemail.com> >> Date: Mon Jun 10 19:38:58 2013 +0200 >> >> ENH: enable unaligned loads on x86 >> >> x86 can handle unaligned load and there is no hand vectorized code in >> this file. It would be a serious compiler bug if it adds vectorization >> without checking for alignment. >> Enables fast complex128 copies which are unaligned on 32 bit gcc >> unless >> compiled with -malign-double. >> >> :040000 040000 d0948d1e1d942d41d50ce9e57bdc430db9a16f9e >> 45a48f383353857b8d0dd24e542c7ab6f137448c M numpy >> >> Link: >> https://github.com/numpy/numpy/commit/aef286debfd11a62f1c337dea55624cee7fd4d9e >> >> > If I undo that change in master, I don't get the seg. fault. > OK, I can duplicate this with -O3 along with another error that shows up. Chuck
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