[issue21983] segfault in ctypes.cast

STINNER Victor added the comment: > Still needs a backport to 2.7 No longer needed, I close the issue. -- nosy: +vstinner resolution: -> fixed stage: backport needed -> resolved status: open -> closed ___ Python tracker

[issue21983] segfault in ctypes.cast

Change by Steve Dower : -- assignee: steve.dower -> stage: patch review -> backport needed versions: -Python 3.6, Python 3.7, Python 3.8 ___ Python tracker ___

[issue21983] segfault in ctypes.cast

Steve Dower added the comment: Still needs a backport to 2.7 -- ___ Python tracker ___ ___ Python-bugs-list mailing list

[issue21983] segfault in ctypes.cast

miss-islington added the comment: New changeset e60f6e1864d80d80f8928afadec617d161a64150 by Miss Islington (bot) in branch '3.7': bpo-21983: Fix a crash in ctypes.cast() when passed a ctypes structured data type (GH-3859)

[issue21983] segfault in ctypes.cast

miss-islington added the comment: New changeset 8ac158a6dfb86880e22003afe0ff39ec31b0a094 by Miss Islington (bot) in branch '3.6': bpo-21983: Fix a crash in ctypes.cast() when passed a ctypes structured data type (GH-3859)

[issue21983] segfault in ctypes.cast

Steve Dower added the comment: The backport to 2.7 needs some help. I can't do it on my laptop for the next week, but I'll try to get to it eventually. Feel free to get there first. -- versions: +Python 3.6 ___ Python

[issue21983] segfault in ctypes.cast

Change by miss-islington : -- pull_requests: +6434 ___ Python tracker ___

[issue21983] segfault in ctypes.cast

Change by miss-islington : -- pull_requests: +6433 stage: backport needed -> patch review ___ Python tracker

[issue21983] segfault in ctypes.cast

Change by Steve Dower : -- assignee: -> steve.dower stage: patch review -> backport needed versions: +Python 3.8 -Python 3.4 ___ Python tracker

[issue21983] segfault in ctypes.cast

Steve Dower added the comment: New changeset d518d8bc8d5dac1a1270612f424d33e0e5afc2b5 by Steve Dower (Oren Milman) in branch 'master': bpo-21983: Fix a crash in ctypes.cast() when passed a ctypes structured data type (GH-3859)

[issue21983] segfault in ctypes.cast

Change by Oren Milman : -- versions: +Python 2.7, Python 3.4 ___ Python tracker ___ ___

[issue21983] segfault in ctypes.cast

Change by Oren Milman : -- versions: +Python 3.7 -Python 2.7, Python 3.4 ___ Python tracker ___

[issue21983] segfault in ctypes.cast

Change by Oren Milman : -- keywords: +patch pull_requests: +3839 stage: -> patch review ___ Python tracker ___

[issue21983] segfault in ctypes.cast

Change by Mark Lawrence : -- nosy: -BreamoreBoy ___ Python tracker ___ ___

[issue21983] segfault in ctypes.cast

Oren Milman added the comment: IMHO, Lib/ctypes/test/test_cast.py is the relevant test. Mark, do you still wish to provide a fix for that? (Otherwise, i would be happy to open a PR.) -- nosy: +Oren Milman ___ Python tracker

[issue21983] segfault in ctypes.cast

Mark Lawrence added the comment: I'll provide a patch but I don't know which test file to use, can somebody please advise. -- nosy: +BreamoreBoy, amaury.forgeotdarc, belopolsky, meador.inge ___ Python tracker rep...@bugs.python.org

[issue21983] segfault in ctypes.cast

New submission from Anthony LaTorre: I get a segfault when trying to cast a string to a structure. import ctypes class Struct(ctypes.Structure): ... _fields_ = [('a', ctypes.c_uint32)] ... s = '0'*100 ctypes.cast(s,Struct) Segmentation fault The docs

[issue21983] segfault in ctypes.cast

Changes by Anthony LaTorre tlator...@gmail.com: -- components: +ctypes ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21983 ___ ___

[issue21983] segfault in ctypes.cast

eryksun added the comment: You need to cast to a pointer type, i.e. POINTER(Struct). Trying to cast to just Struct should raise a TypeError. Instead this revealed a bug in cast_check_pointertype (3.4.1): http://hg.python.org/cpython/file/c0e311e010fc/Modules/_ctypes/_ctypes.c#l5225