Issue 36594: Undefined behavior due to incorrect usage of %p in format strings (original) (raw)

Issue36594

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This issue has been migrated to GitHub: https://github.com/python/cpython/issues/80775

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process

Created on 2019-04-11 00:10 by ZackerySpytz, last changed 2022-04-11 14:59 by admin. This issue is now closed.

Messages (4)
msg339907 - (view)	Author: Zackery Spytz (ZackerySpytz) *	Date: 2019-04-11 00:14
The attached PR fixes incorrect usages of %p in format strings.
msg340151 - (view)	Author: Serhiy Storchaka (serhiy.storchaka) *	Date: 2019-04-13 11:01
Are not all pointer types (except pointers to functions) automatically converted to/from void*.
msg340152 - (view)	Author: Stefan Krah (skrah) *	Date: 2019-04-13 11:17
gcc warns with -pedantic: ptr.c: In function ‘main’: ptr.c:5:13: warning: format ‘%p’ expects argument of type ‘void *’, but argument 2 has type ‘int *’ [-Wformat=] printf ("%p", &i); It is pedantic indeed, I wonder if machines with different pointer sizes still exist.
msg341564 - (view)	Author: Brett Cannon (brett.cannon) *	Date: 2019-05-06 16:56
New changeset 1a2252ed39bc1b71cdaa935d7726d82909af93ab by Brett Cannon (Zackery Spytz) in branch 'master': bpo-36594: Fix incorrect use of %p in format strings (GH-12769) https://github.com/python/cpython/commit/1a2252ed39bc1b71cdaa935d7726d82909af93ab