[New-bugs-announce] [issue31962] test_importlib double free or corruption

[Thomas Knox]

New submission from Thomas Knox <tknox at mac.com>:

On a Raspberry Pi 3 running

Linux pi3 4.9.58-v7+ #1046 SMP Tue Oct 24 17:07:15 BST 2017 armv7l GNU/Linux

C(PP)FLAGS="-O6 -march=armv8-a+crc -mtune=cortex-a53 -mfpu=crypto-neon-fp-armv8 -mfloat-abi=hard -ftree-vectorize"

Built with
./configure --enable-loadable-sqlite-extensions --enable-optimizations --disable-shared --with-lto --enable-ipv6 --with-threads

When the build phase is
...
Running code to generate profile data (this can take a while):
make run_profile_task
make[1]: Entering directory '/home/pi/Downloads/Python-3.6.3'
: # FIXME: can't run for a cross build
./python -m test.regrtest --pgo || true
Run tests sequentially
...

It errors and dies with
0:23:56 load avg: 0.87 [176/405] test_importlib
*** Error in `./python': double free or corruption (!prev): 0x014166e0 ***
Fatal Python error: Aborted

Thread 0x685ff460 (most recent call first):
  File "<frozen importlib._bootstrap>", line 98 in acquire
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/test_importlib/test_locks.py", line 83 in _acquire
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/test_importlib/test_locks.py", line 93 in f
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/lock_tests.py", line 38 in task

Thread 0x76f04000 (most recent call first):
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/lock_tests.py", line 17 in _wait
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/lock_tests.py", line 56 in wait_for_finished
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/test_importlib/test_locks.py", line 99 in run_deadlock_avoidance_test
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/test_importlib/test_locks.py", line 113 in test_no_deadlock
  File "/home/pi/Downloads/Python-3.6.3/Lib/unittest/case.py", line 605 in run
  File "/home/pi/Downloads/Python-3.6.3/Lib/unittest/case.py", line 653 in __call__
  File "/home/pi/Downloads/Python-3.6.3/Lib/unittest/suite.py", line 122 in run
  File "/home/pi/Downloads/Python-3.6.3/Lib/unittest/suite.py", line 84 in __call__
  File "/home/pi/Downloads/Python-3.6.3/Lib/unittest/suite.py", line 122 in run
  File "/home/pi/Downloads/Python-3.6.3/Lib/unittest/suite.py", line 84 in __call__
  File "/home/pi/Downloads/Python-3.6.3/Lib/unittest/suite.py", line 122 in run
  File "/home/pi/Downloads/Python-3.6.3/Lib/unittest/suite.py", line 84 in __call__
  File "/home/pi/Downloads/Python-3.6.3/Lib/unittest/suite.py", line 122 in run
  File "/home/pi/Downloads/Python-3.6.3/Lib/unittest/suite.py", line 84 in __call__
  File "/home/pi/Downloads/Python-3.6.3/Lib/unittest/suite.py", line 122 in run
  File "/home/pi/Downloads/Python-3.6.3/Lib/unittest/suite.py", line 84 in __call__
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/support/__init__.py", line 1765 in run
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/support/__init__.py", line 1889 in _run_suite
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/support/__init__.py", line 1933 in run_unittest
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/libregrtest/runtest.py", line 172 in test_runner
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/libregrtest/runtest.py", line 173 in runtest_inner
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/libregrtest/runtest.py", line 137 in runtest
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/libregrtest/main.py", line 378 in run_tests_sequential
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/libregrtest/main.py", line 457 in run_tests
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/libregrtest/main.py", line 535 in _main
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/libregrtest/main.py", line 509 in main
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/libregrtest/main.py", line 584 in main
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/regrtest.py", line 46 in _main
  File "/home/pi/Downloads/Python-3.6.3/Lib/test/regrtest.py", line 50 in <module>
  File "/home/pi/Downloads/Python-3.6.3/Lib/runpy.py", line 85 in _run_code
  File "/home/pi/Downloads/Python-3.6.3/Lib/runpy.py", line 193 in _run_module_as_main
Aborted

Every time. These exact same parameters and flags worked with 3.6.2 with no issue, but they die on 3.6.3

----------
components: Build
messages: 305676
nosy: DNSGeek
priority: normal
severity: normal
status: open
title: test_importlib double free or corruption
type: crash
versions: Python 3.6

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31962>
_______________________________________