https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109970
Bug ID: 109970 Summary: -Wstringop-overflow should work with parameter forward declarations Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: muecker at gwdg dot de Target Milestone: --- For bar I get the expected warning but not for foo. void bar(int x, char buf[x]); void foo(int x; char buf[x], int x); int main() { char buf[10]; bar(11, buf); foo(buf, 11); } https://godbolt.org/z/zhzr43c55