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[3.6] bpo-20891: Remove test_capi.test_bpo20891() #5425

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merged 1 commit into from Jan 29, 2018
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[3.6] bpo-20891: Remove test_capi.test_bpo20891() #5425

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13 Lib/test/test_capi.py
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@@ -494,19 +494,6 @@ def test_pre_initialization_api(self):
self.assertEqual(out, '')
self.assertEqual(err, '')

@unittest.skipIf(True,
"FIXME: test fails randomly because of a race conditon, "
"see bpo-20891")
def test_bpo20891(self):
"""
bpo-20891: Calling PyGILState_Ensure in a non-Python thread before
calling PyEval_InitThreads() must not crash. PyGILState_Ensure() must
call PyEval_InitThreads() for us in this case.
"""
out, err = self.run_embedded_interpreter("bpo20891")
self.assertEqual(out, '')
self.assertEqual(err, '')


class SkipitemTest(unittest.TestCase):

48 Programs/_testembed.c
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@@ -149,53 +149,6 @@ static int test_pre_initialization_api(void)
return 0;
}

static void bpo20891_thread(void *lockp)
{
PyThread_type_lock lock = *((PyThread_type_lock*)lockp);

PyGILState_STATE state = PyGILState_Ensure();
if (!PyGILState_Check()) {
fprintf(stderr, "PyGILState_Check failed!");
abort();
}

PyGILState_Release(state);

PyThread_release_lock(lock);

PyThread_exit_thread();
}

static int test_bpo20891(void)
{
/* bpo-20891: Calling PyGILState_Ensure in a non-Python thread before
calling PyEval_InitThreads() must not crash. PyGILState_Ensure() must
call PyEval_InitThreads() for us in this case. */
PyThread_type_lock lock = PyThread_allocate_lock();
if (!lock) {
fprintf(stderr, "PyThread_allocate_lock failed!");
return 1;
}

_testembed_Py_Initialize();

long thrd = PyThread_start_new_thread(bpo20891_thread, &lock);
if (thrd == -1) {
fprintf(stderr, "PyThread_start_new_thread failed!");
return 1;
}
PyThread_acquire_lock(lock, WAIT_LOCK);

Py_BEGIN_ALLOW_THREADS
/* wait until the thread exit */
PyThread_acquire_lock(lock, WAIT_LOCK);
Py_END_ALLOW_THREADS

PyThread_free_lock(lock);

return 0;
}


/* *********************************************************
* List of test cases and the function that implements it.
@@ -219,7 +172,6 @@ static struct TestCase TestCases[] = {
{ "forced_io_encoding", test_forced_io_encoding },
{ "repeated_init_and_subinterpreters", test_repeated_init_and_subinterpreters },
{ "pre_initialization_api", test_pre_initialization_api },
{ "bpo20891", test_bpo20891 },
{ NULL, NULL }
};