[New-bugs-announce] [issue33455] test.test_posix.TestPosixSpawn::test_specify_environment fails with custom LD_LIBRARY_PATH

[Miro Hrončok]

New submission from Miro Hrončok <miro at hroncok.cz>:

When we build Python in Fedora, we set LD_LIBRARY_PATH environment variable so the testsuite is run against the currently built Python.

However a test added in ef347535f289baad22c0601e12a36b2dcd155c3a (test_specify_environment) spawns a process without passing the environment variables. This means that the new process fails with 

    error while loading shared libraries: libpython3.7m.so.1.0: cannot open shared object file: No such file or directory

And the test fails with:

test_specify_environment (test.test_posix.TestPosixSpawn) ... /builddir/build/BUILD/Python-3.7.0b4/build/optimized/python: error while loading shared libraries: libpython3.7m.so.1.0: cannot open shared object file: No such file or directory
test test_posix failed
FAIL
======================================================================
FAIL: test_specify_environment (test.test_posix.TestPosixSpawn)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/Python-3.7.0b4/Lib/test/test_posix.py", line 1467, in test_specify_environment
    self.assertEqual(os.waitpid(pid, 0), (pid, 0))
AssertionError: Tuples differ: (11457, 32512) != (11457, 0)
First differing element 1:
32512
0
- (11457, 32512)
?         ^^^^^
+ (11457, 0)
?         ^
----------------------------------------------------------------------
Ran 101 tests in 0.608s
FAILED (failures=1, skipped=9)
1 test failed again:
    test_posix
Total duration: 23 min 22 sec
Tests result: FAILURE

I believe that a fix for this is to copy os.environ, update it with {'foo': 'bar'} and pass that copy. I'll check and send PR if it works.

----------
components: Tests
messages: 316363
nosy: hroncok, serhiy.storchaka
priority: normal
severity: normal
status: open
title: test.test_posix.TestPosixSpawn::test_specify_environment fails with custom LD_LIBRARY_PATH
versions: Python 3.7, Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33455>
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