https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108074
Bug ID: 108074
Summary: Incorrect stringop-overflow warning
Product: gcc
Version: 12.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: alastair.j.irving at gmail dot com
Target Milestone: ---
Created attachment 54071
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54071&action=edit
Reproducer
Compiling with -O2 or higher I get an incorrect warning:
test.c: In function ‘foo3’:
test.c:15:5: warning: ‘foo’ accessing 16 bytes in a region of size 8
[-Wstringop-overflow=]
This doesn't appear at lower optimization levels. It's also very sensative to
the function, for example removing the return on the next line makes the
warning go away.
