[New-bugs-announce] [issue44161] free: invalid pointer on graph and photo.message imports

[Niels Hofmans]

New submission from Niels Hofmans <hello at ironpeak.be>:

Ref https://github.com/googleapis/python-pubsub/issues/414#issuecomment-842446505

@hazcod observed a fault when importing google.cloud.pubsub_v1 as above;

# strace python3 -c 'from google.cloud import pubsub_v1'
...
writev(2, [{iov_base="free(): invalid pointer", iov_len=23}, {iov_base="\n", iov_len=1}], 2free(): invalid pointer
) = 24
...
--- SIGABRT {si_signo=SIGABRT, si_code=SI_TKILL, si_pid=306, si_uid=0} ---
+++ killed by SIGABRT +++
Aborted
But importing google.cloud.pubsub_v1 isn't really required here; the fault can be reproduced with importing only these two dependencies...

python3 -c 'import proto.message, grpc;'
free(): invalid pointer
Aborted
Importing either by itself doesn't crash. Further, importing them in the other order doesn't crash. I do not understand why.

python3 -c 'import grpc, proto.message; print(grpc, proto.message)'
<module 'grpc' from '/usr/local/lib/python3.9/site-packages/grpc/__init__.py'> <module 'proto.message' from '/usr/local/lib/python3.9/site-packages/proto/message.py'>

----------
components: Library (Lib)
messages: 393830
nosy: hazcod
priority: normal
severity: normal
status: open
title: free: invalid pointer on graph and photo.message imports
type: crash
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue44161>
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