http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60100
--- Comment #7 from Andreas Schwab <sch...@linux-m68k.org> --- # 3416 "/home/lavr/cxx/src/connect/ncbi_socket.c" 3 4 The file is marked as system header, perhaps because the expansion on this line came from a system header? (looks like assert(...)) Note that there are several occurences of # 3416, some as system headers, some not, but it's the last one that matters for line 3447.