This is valid from 4.0 to 4.5. Very minor, agreed. const char *cp = "\z\é\ ";
gives foo.cc:1:1: warning: unknown escape sequence '\z' foo.cc:1:1: warning: unknown escape sequence: '\303' foo.cc:1:1: warning: unknown escape sequence: '\040' I think the first one should also have its colon. -- Summary: Inconsistency in warnings on invalid \-escapes Product: gcc Version: 4.5.0 Status: UNCONFIRMED Severity: trivial Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: akim dot demaille at gmail dot com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41067