I just tried to compile Suse Linux package hydrogen-0.9.3-41 with the GNU C++ compiler version 4.3 snapshot 20070112.
The compiler said src/lib/Object.cpp:306: internal compiler error: in calc_dfs_tree, at dominance.c:374 Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. Preprocessed source code attached. Flag -O3 required. -- Summary: ice for legal code with -O3 Product: gcc Version: 4.3.0 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=30509