python3.4: test_faulthandler fails on arm64, lets the buildd hang

test_register_chain (test.test_faulthandler.FaultHandlerTests) ... FAIL

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FAIL: test_register_chain (test.test_faulthandler.FaultHandlerTests)
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Traceback (most recent call last):
  File "/home/doko/python/python3.4-3.4~b1/Lib/test/test_faulthandler.py", line 592, in test_register_chain
    self.check_register(chain=True)
  File "/home/doko/python/python3.4-3.4~b1/Lib/test/test_faulthandler.py", line 570, in check_register
    self.assertRegex(trace, regex)
AssertionError: Regex didn't match: '^Stack \\(most recent call first\\):\n File "<string>", line 7 in func\n File "<string>", line 28 in <module>$' not found in 'Stack (most recent call first):\n File "<string>", line 7 in func\n File "<string>", line 28 in <module>\nDebug memory block at address p=0x1f767060: API \'\x00\'\n 12693960699257290752 bytes originally requested\n The 7 pad bytes at p-7 are not all FORBIDDENBYTE (0xfb):\n at p-7: 0x00 *** OUCH\n at p-6: 0x00 *** OUCH\n at p-5: 0x00 *** OUCH\n at p-4: 0x00 *** OUCH\n at p-3: 0x00 *** OUCH\n at p-2: 0x00 *** OUCH\n at p-1: 0x00 *** OUCH\n Because memory is corrupted at the start, the count of bytes requested\n may be bogus, and checking the trailing pad bytes may segfault.\n The 8 pad bytes at tail=0xb02a02003f767060 are'

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Ran 31 tests in 20.589s

FAILED (failures=1)
test test_faulthandler failed