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test_io has two unit tests which trigger a deadlock:

  • test_daemon_threads_shutdown_stdout_deadlock()
  • test_daemon_threads_shutdown_stderr_deadlock()

These tests call Py_FatalError() if the expected bug is triggered
which calls abort(). Use test.support.SuppressCrashReport to prevent
the creation on a core dump, to fix the warning:

Warning -- files was modified by test_io
Before: []
After: ['python.core']

@vstinner vstinner added the tests Tests in the Lib/test dir label Apr 21, 2017
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@Haypo, thanks for your PR! By analyzing the history of the files in this pull request, we identified @benjaminp, @ezio-melotti and @serhiy-storchaka to be potential reviewers.

test_io has two unit tests which trigger a deadlock:

* test_daemon_threads_shutdown_stdout_deadlock()
* test_daemon_threads_shutdown_stderr_deadlock()

These tests call Py_FatalError() if the expected bug is triggered
which calls abort(). Use test.support.SuppressCrashReport to prevent
the creation on a core dump, to fix the warning:

Warning -- files was modified by test_io
  Before: []
  After:  ['python.core']
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(oops, i pushed a minor change to remove an empty line :-))

@vstinner vstinner merged commit 2a1aed0 into python:master Apr 21, 2017
@vstinner vstinner deleted the test_io_crash branch April 21, 2017 15:59
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Backport 3.6: #1241

vstinner added a commit that referenced this pull request Apr 21, 2017
test_io has two unit tests which trigger a deadlock:

* test_daemon_threads_shutdown_stdout_deadlock()
* test_daemon_threads_shutdown_stderr_deadlock()

These tests call Py_FatalError() if the expected bug is triggered
which calls abort(). Use test.support.SuppressCrashReport to prevent
the creation on a core dump, to fix the warning:

Warning -- files was modified by test_io
  Before: []
  After:  ['python.core']
(cherry picked from commit 2a1aed0)
vstinner added a commit that referenced this pull request Apr 28, 2017
…1344)

* bpo-30107: Make SuppressCrashReport quiet on macOS (#1279) (#1335)

On macOS, SuppressCrashReport now redirects /usr/bin/defaults command
stderr into a pipe to not pollute stderr. It fixes a
test_io.test_daemon_threads_shutdown_stderr_deadlock() failure when
the CrashReporter domain doesn't exists. Message logged into stderr:

2017-04-24 16:57:21.432 defaults[41046:2462851]
The domain/default pair of (com.apple.CrashReporter, DialogType) does not exist
(cherry picked from commit d819ad9)

* bpo-30107: don't dump core on expected test_io crash (#1235)

test_io has two unit tests which trigger a deadlock:

* test_daemon_threads_shutdown_stdout_deadlock()
* test_daemon_threads_shutdown_stderr_deadlock()

These tests call Py_FatalError() if the expected bug is triggered
which calls abort(). Use test.support.SuppressCrashReport to prevent
the creation on a core dump, to fix the warning:

Warning -- files was modified by test_io
  Before: []
  After:  ['python.core']
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3 participants