A simple fix in
https://trac.sagemath.org/ticket/26150
(fraction field: fix conversion from symbolic ring)
turns out to have an side effect in function_field:
File "src/sage/rings/function_field/function_field.py", line 1602, in
sage.rings.function_field.function_field.FunctionField_polymod.hom
Failed example:
L.hom(r, base_morphism=phi)
Exception raised:
Traceback (most recent call last):
...
ValueError: invalid literal for int() with base 10: "Error in
dput(length(sage1)) : object 'sage1' not foun"
This seems like a weird error message (not only because of the "not
foun" ;) )
Does anyone have any glue what is going on here?
Best
Daniel
full traceback (from the ticket patchbot log):
File "src/sage/rings/function_field/function_field.py", line 1602, in
sage.rings.function_field.function_field.FunctionField_polymod.hom
Failed example:
L.hom(r, base_morphism=phi)
Exception raised:
Traceback (most recent call last):
File
"/opt/sage/local/lib/python2.7/site-packages/sage/doctest/forker.py",
line 614, in _run
self.compile_and_execute(example, compiler, test.globs)
File
"/opt/sage/local/lib/python2.7/site-packages/sage/doctest/forker.py",
line 1025, in compile_and_execute
exec(compiled, globs)
File "<doctest
sage.rings.function_field.function_field.FunctionField_polymod.hom[11]>",
line 1, in <module>
L.hom(r, base_morphism=phi)
File
"/opt/sage/local/lib/python2.7/site-packages/sage/rings/function_field/function_field.py",
line 1657, in hom
codomain = pushout(codomain, base_morphism.codomain())
File
"/opt/sage/local/lib/python2.7/site-packages/sage/categories/pushout.py",
line 3917, in pushout
elif S.has_coerce_map_from(Rs[-1]):
File "sage/structure/parent.pyx", line 2015, in
sage.structure.parent.Parent.has_coerce_map_from
(build/cythonized/sage/structure/parent.c:17788)
cpdef bint has_coerce_map_from(self, S) except -2:
File "sage/structure/parent.pyx", line 2037, in
sage.structure.parent.Parent.has_coerce_map_from
(build/cythonized/sage/structure/parent.c:17738)
return self._internal_coerce_map_from(S) is not None
File "sage/structure/parent.pyx", line 2179, in
sage.structure.parent.Parent._internal_coerce_map_from
(build/cythonized/sage/structure/parent.c:18750)
mor = self.discover_coerce_map_from(S)
File "sage/structure/parent.pyx", line 2316, in
sage.structure.parent.Parent.discover_coerce_map_from
(build/cythonized/sage/structure/parent.c:19204)
user_provided_mor = self._coerce_map_from_(S)
File "sage/structure/parent_old.pyx", line 354, in
sage.structure.parent_old.Parent._coerce_map_from_
(build/cythonized/sage/structure/parent_old.c:7094)
cpdef _coerce_map_from_(self, S):
File
"/opt/sage/local/lib/python2.7/site-packages/sage/rings/function_field/function_field.py",
line 506, in _coerce_map_from_
sourcegen_in_self = self(source.variable_name())
File "sage/structure/parent.pyx", line 921, in
sage.structure.parent.Parent.__call__
(build/cythonized/sage/structure/parent.c:9679)
return mor._call_(x)
File "sage/structure/coerce_maps.pyx", line 145, in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(build/cythonized/sage/structure/coerce_maps.c:4574)
raise
File "sage/structure/coerce_maps.pyx", line 140, in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(build/cythonized/sage/structure/coerce_maps.c:4442)
return C._element_constructor(x)
File
"/opt/sage/local/lib/python2.7/site-packages/sage/rings/function_field/function_field.py",
line 2409, in _element_constructor_
x = self._field(x)
File "sage/structure/parent.pyx", line 921, in
sage.structure.parent.Parent.__call__
(build/cythonized/sage/structure/parent.c:9679)
return mor._call_(x)
File "sage/structure/coerce_maps.pyx", line 145, in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(build/cythonized/sage/structure/coerce_maps.c:4574)
raise
File "sage/structure/coerce_maps.pyx", line 140, in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(build/cythonized/sage/structure/coerce_maps.c:4442)
return C._element_constructor(x)
File
"/opt/sage/local/lib/python2.7/site-packages/sage/rings/fraction_field.py",
line 634, in _element_constructor_
x = x0.numerator()*y0.denominator()
File "sage/structure/element.pyx", line 1536, in
sage.structure.element.Element.__mul__
(build/cythonized/sage/structure/element.c:12263)
return coercion_model.bin_op(left, right, mul)
File "sage/structure/coerce.pyx", line 1173, in
sage.structure.coerce.CoercionModel_cache_maps.bin_op
(build/cythonized/sage/structure/coerce.c:9733)
action = self.get_action(xp, yp, op, x, y)
File "sage/structure/coerce.pyx", line 1716, in
sage.structure.coerce.CoercionModel_cache_maps.get_action
(build/cythonized/sage/structure/coerce.c:16903)
action = self.discover_action(R, S, op, r, s)
File "sage/structure/coerce.pyx", line 1872, in
sage.structure.coerce.CoercionModel_cache_maps.discover_action
(build/cythonized/sage/structure/coerce.c:18489)
action = (<Parent>S).get_action(R, op, False, s, r)
File "sage/structure/parent.pyx", line 2508, in
sage.structure.parent.Parent.get_action
(build/cythonized/sage/structure/parent.c:21460)
action = self.discover_action(S, op, self_on_left, self_el, S_el)
File "sage/structure/parent.pyx", line 2615, in
sage.structure.parent.Parent.discover_action
(build/cythonized/sage/structure/parent.c:22762)
action = detect_element_action(self, S, self_on_left, self_el, S_el)
File "sage/structure/coerce_actions.pyx", line 233, in
sage.structure.coerce_actions.detect_element_action
(build/cythonized/sage/structure/coerce_actions.c:5919)
return (RightModuleAction if X_on_left else LeftModuleAction)(Y,
X, y, x)
File "sage/structure/coerce_actions.pyx", line 342, in
sage.structure.coerce_actions.ModuleAction.__init__
(build/cythonized/sage/structure/coerce_actions.c:6815)
self.extended_base = pushout(G, S)
File
"/opt/sage/local/lib/python2.7/site-packages/sage/categories/pushout.py",
line 3880, in pushout
R_tower = construction_tower(R)
File
"/opt/sage/local/lib/python2.7/site-packages/sage/categories/pushout.py",
line 4219, in construction_tower
f, R = c
File
"/opt/sage/local/lib/python2.7/site-packages/sage/interfaces/interface.py",
line 711, in __iter__
for i in range(1, len(self)+1):
File
"/opt/sage/local/lib/python2.7/site-packages/sage/interfaces/r.py", line
1318, in __len__
return int(self.parent().eval('dput(length(%s))'%self.name())[:-1] )
ValueError: invalid literal for int() with base 10: "Error in
dput(length(sage1)) : object 'sage1' not foun"
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