When feeding a preprocessed input file consisting of only a newline to gcc, it gets a segmentation fault:
snaga:tmp> rm -f test.i snaga:tmp> echo > test.i snaga:tmp> gcc test.i test.i:1: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. -- Summary: ICE on empty preprocessed input Product: gcc Version: 3.4.3 Status: UNCONFIRMED Severity: minor Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: lalle at sics dot se CC: gcc-bugs at gcc dot gnu dot org GCC build triplet: i686-pc-linux-gnu GCC host triplet: i686-pc-linux-gnu GCC target triplet: i686-pc-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20239