[issue31761] regrtest: faulthandler.enable() fails with io.UnsupportedOperation: fileno when run from IDLE

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

The Python console exits because test.libregrtest.main.Regrtest._main calls sys.exit.  test.autotest consists of

from test.libregrtest import main
main()

The main call should be wrapped with try:...except sys.exit: pass

The output also has this variance from the command line result.

0:15:47 [319/407/2] test_subprocess
minkernel\crts\ucrt\src\appcrt\lowio\write.cpp(49) : Assertion failed: (_osfile(fh) & FOPEN)
minkernel\crts\ucrt\src\appcrt\lowio\close.cpp(49) : Assertion failed: (_osfile(fh) & FOPEN)
minkernel\crts\ucrt\src\appcrt\lowio\close.cpp(49) : Assertion failed: (_osfile(fh) & FOPEN)

The list of tests skipped seems to be the same.

By setting sys.argv before importing autotest, I got
======================================================================
FAIL: test_ps1 (test.test_code_module.TestInteractiveConsole)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "F:\dev\3x\lib\test\test_code_module.py", line 35, in test_ps1
    self.assertEqual(self.sysmod.ps1, '>>> ')
AssertionError: <MagicMock name='sys.ps1' id='71914032'> != '>>> '

======================================================================
FAIL: test_ps2 (test.test_code_module.TestInteractiveConsole)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "F:\dev\3x\lib\test\test_code_module.py", line 40, in test_ps2
    self.assertEqual(self.sysmod.ps2, '... ')
AssertionError: <MagicMock name='sys.ps2' id='72189080'> != '... '

----------------------------------------------------------------------

======================================================================
FAIL: test_missing_filename_main_with_argv (test.test_warnings.CWarnTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "F:\dev\3x\lib\test\test_warnings\__init__.py", line 446, in test_missing_filename_main_with_argv
    self.assertEqual(w[-1].filename, sys.argv[0])
AssertionError: '__main__' != ''
- __main__
+

and

======================================================================
FAIL: test_missing_filename_main_with_argv (test.test_warnings.PyWarnTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "F:\dev\3x\lib\test\test_warnings\__init__.py", line 446, in test_missing_filename_main_with_argv
    self.assertEqual(w[-1].filename, sys.argv[0])
AssertionError: '__main__' != ''
- __main__

Wneh I start python with python.bat, sys.argv = [''], not ['__main__'].

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31761>
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