https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63591
Bug ID: 63591 Summary: No syntax error yielded for semicolons inside a function proto, instead code with memory corruption can be created Product: gcc Version: 4.8.3 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: k.s.matheussen at notam02 dot no This code should, as far as I know, not be legal C code: extern int afunction( int anint, struct Happ *happ; // <- Extra semicolon ); int afunction( int velocityvelocity, struct Happ *happ ) { return 208; } Gcc does not complain about this code, even with -Wall and -Werror. I'm also seeing memory corruption in a larger program I'm working on, because of this extra misplaced semicolon, but I haven't been able to create a smaller example doing this. Please let me know if you need the larger example causing memory corruption. I consider this bug (I assume it is a bug) quite serious. If adding this extra semicolon by mistake (like I did), things appear to work as normal, whille possibly getting serious bugs which are hard to trace.