The bug caught a bfd_assert, which *REALLY* isn't helpful, as
this is just a call to _bfd_error_handler and then linking
continues with *no* exit error. I've changed bfd_assert locally
to do like bfd_abort and also call _exit (EXIT_FAILURE), and I'd
like to poll interest in doing that or the equivalent for the
FSF code too. If nothing else, a helpful code comment why it
isn't done. I guess letting it continue is helpful for some
situations and bfd users, but not the common case of the linker.
Perhaps do it optionally, default on for the linker?