I just tried to compile the Suse Linux package djvulibre-3.5.21-1.85 with the GNU g++ version 4.5 snapshot 20090507.
The compiler said DjVuDocEditor.cpp:596: error: EH edge 283->1258 is missing DjVuDocEditor.cpp:596: error: unnecessary EH edge 283->982 DjVuDocEditor.cpp:596: error: EH edge 285->1258 is missing DjVuDocEditor.cpp:596: error: unnecessary EH edge 285->986 DjVuDocEditor.cpp:596: error: EH edge 287->1258 is missing DjVuDocEditor.cpp:596: error: unnecessary EH edge 287->991 DjVuDocEditor.cpp:596: error: EH edge 289->1258 is missing DjVuDocEditor.cpp:596: error: unnecessary EH edge 289->997 ... DjVuDocEditor.cpp:596: internal compiler error: verify_flow_info failed Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. Preprocessed source code attached. Flag -O2 required. -- Summary: verify_flow_info failed with -O2 Product: gcc Version: 4.5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: dcb314 at hotmail dot com GCC host triplet: x86_64-suse-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40100