https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84213
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> --- In the Fortran case the DECL_VALUE_EXPR is COMPONENT_REF<module_ra_gfdleta.eq.0, em1v> and rtl_for_decl_location gets to a location via loc_list_from_tree which eventually looks at DECL_VALUE_EXPR. I'm quite sure the rev. is responsible for similar Ada -flto -g failures. We simply may _not_ add location attributes early. Note adding a location refering to another entity makes this entity non-removable. Well - we kind of rely on late attribute pruning for removed stuff here in the traditional model. With LTO we'd need to invent a new debug hook that tells the middle-end to perserve the decl because it might have interesting debug info - but that _will_ cause refered stuff to be preserved. So I think we need to revert this patch and instead make sure those Ada variables do not get removed? Like by marking them with DECL_PRESERVE_P? Trying that (figuring where those decls are created). Pierre-Marie, maybe you can help here as well.