[Cython] Failing test reimport_from_subinterpreter

[Stefan Behnel]

Jeroen Demeyer schrieb am 16.10.2018 um 12:42:
> I'm getting various reports of the test reimport_from_subinterpreter
> failing (within Sage, Cython 0.29, Python 2.7.15).
> 
> Annoyingly, the problem can only be reproduced when running the full Cython
> testsuite, not when running the test in isolation. I'll continue to
> investigate, but I'm already posting it here in case somebody has an idea.
> The error is not very enlightening (is there a way to get the exception
> from the subinterpreter?):
> 
> End-to-end reimport_from_subinterpreter ...
> /home/jdemeyer/sage-test/local/bin/python2 setup.py build_ext --inplace
> Compiling package/subtest.pyx because it changed.
> Compiling subtest.pyx because it changed.
> [1/2] Cythonizing package/subtest.pyx
> [2/2] Cythonizing subtest.pyx
> running build_ext
> building 'package.subtest' extension
> creating build
> creating build/temp.linux-ppc64le-2.7
> creating build/temp.linux-ppc64le-2.7/package
> gcc -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wno-unused
> -fPIC -I/home/jdemeyer/sage-test/local/include/python2.7 -c
> package/subtest.c -o build/temp.linux-ppc64le-2.7/package/subtest.o
> gcc -pthread -shared -L/home/jdemeyer/sage-test/local/lib
> -Wl,-rpath,/home/jdemeyer/sage-test/local/lib
> -L/home/jdemeyer/sage-test/local/lib
> -Wl,-rpath,/home/jdemeyer/sage-test/local/lib
> build/temp.linux-ppc64le-2.7/package/subtest.o
> -L/home/jdemeyer/sage-test/local/lib -lpython2.7 -o
> /home/jdemeyer/sage-test/local/var/tmp/sage/build/cython-0.29/src/TEST_TMP/run/reimport_from_subinterpreter/package/subtest.so
> 
> building 'subtest' extension
> gcc -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wno-unused
> -fPIC -I/home/jdemeyer/sage-test/local/include/python2.7 -c subtest.c -o
> build/temp.linux-ppc64le-2.7/subtest.o
> gcc -pthread -shared -L/home/jdemeyer/sage-test/local/lib
> -Wl,-rpath,/home/jdemeyer/sage-test/local/lib
> -L/home/jdemeyer/sage-test/local/lib
> -Wl,-rpath,/home/jdemeyer/sage-test/local/lib
> build/temp.linux-ppc64le-2.7/subtest.o -L/home/jdemeyer/sage-test/local/lib
> -lpython2.7 -o
> /home/jdemeyer/sage-test/local/var/tmp/sage/build/cython-0.29/src/TEST_TMP/run/reimport_from_subinterpreter/subtest.so
> 
> 
> /home/jdemeyer/sage-test/local/var/tmp/sage/build/cython-0.29/src/Cython/Compiler/Main.py:367:
> FutureWarning: Cython directive 'language_level' not set, using 2 for now
> (Py2). This will change in a later release! File:
> /home/jdemeyer/sage-test/local/var/tmp/sage/build/cython-0.29/src/TEST_TMP/run/reimport_from_subinterpreter/package/subtest.pyx
> 
>   tree = Parsing.p_module(s, pxd, full_module_name)
> /home/jdemeyer/sage-test/local/var/tmp/sage/build/cython-0.29/src/Cython/Compiler/Main.py:367:
> FutureWarning: Cython directive 'language_level' not set, using 2 for now
> (Py2). This will change in a later release! File:
> /home/jdemeyer/sage-test/local/var/tmp/sage/build/cython-0.29/src/TEST_TMP/run/reimport_from_subinterpreter/subtest.pyx
> 
>   tree = Parsing.p_module(s, pxd, full_module_name)
> 
> 
> /home/jdemeyer/sage-test/local/bin/python2 -c "import subtest;
> subtest.run_main()"
> Module loaded: package.subtest
> 
> 
> 
> /home/jdemeyer/sage-test/local/bin/python2 -c "import subtest;
> subtest.run_sub()"
> 
> Traceback (most recent call last):
>   File "<string>", line 1, in <module>
> ImportError: No module named package

The error message is right above. ^^^


> Traceback (most recent call last):
>   File "<string>", line 1, in <module>
>   File "subtest.pyx", line 44, in subtest.run_sub
>     assert 0 == run_in_subinterpreter(b'import package')
> AssertionError

Difficult to say why this would fail to find the package. Could it be an
import path problem? Current directory missing from the PYTHONPATH or
something like that?

Stefan