[Bug 1784854] Re: segfault in _abc__abc_instancecheck_impl

[Corey Bryant]

Attaching coredump for segfault

sudo gdb /usr/bin/python3.7-dbg /tmp/core-python.15763.c1.1533128766

** Summary changed:

- segfault
+ segfault in _abc__abc_instancecheck_impl

** Summary changed:

- segfault in _abc__abc_instancecheck_impl
+ segfault in _abc__abc_instancecheck_impl at ../Modules/_abc.c:521

** Attachment added: "core-python.15763.c1.1533128766"
   https://bugs.launchpad.net/ubuntu/+source/python3.7/+bug/1784854/+attachment/5170330/+files/core-python.15763.c1.1533128766

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https://bugs.launchpad.net/bugs/1784854

Title:
  segfault in _abc__abc_instancecheck_impl at ../Modules/_abc.c:521

Status in python3.7 package in Ubuntu:
  New

Bug description:
  To recreate:

  git clone https://github.com/coreycb/heat.git
  cd heat
  tox -e py37

  You'll notice the most recent commit to this repo updates tox.ini to
  use py3.7 and it runs a single test that I've narrowed down on.

  Running tox should result in a segfault.

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