https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80924
Bug ID: 80924 Summary: Value range prediction affected by optimization Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: shane at paga dot moe Target Milestone: --- Created attachment 41442 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41442&action=edit The testing code This simple c code can successfully compiled in -Wall -Werror But not in -O2 -Wall -Werror Here is the output: ‘snprintf’ output between 3 and 6 bytes into a destination of size 5