https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83118
--- Comment #36 from Paul Thomas <pault at gcc dot gnu.org> --- Created attachment 49412 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49412&action=edit An updated patch The patch has been evolving... slowly. I found that dependency_57.f90 segfaulted in runtime so I have fixed that. I believe that I know how to resolve Tobias's query. I hope to submit a complete patch in the coming days. Paul