http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00822.html
I was wrong when I thought TREE_BLOCKs were only attached to DECL_INITIAL for current_function_decl. They are also reachable from EXPRs embedded in some types emitted by Fortran. These are pretty useless, so perhaps it'd be a good idea to clean them up in Fortran's free_lang_data langhook, but letting them through the streamer is harmless. -- Summary: Cleanup TREE_BLOCK Product: gcc Version: 4.5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: burnus at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40756