Hi. Likely due to the recent changes / extensions to the namespace association mechanisms to accomodate the parallel STL, the legacy hashed containers are not usable anymore in debug mode. Just compile with -D_GLIBCXX_DEBUG:
#include <ext/hash_map> #include <ext/hash_set> -- Summary: -D_GLIBCXX_DEBUG vs ext/hash_* Product: gcc Version: 4.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libstdc++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: pcarlini at suse dot de http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33633