http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52325
--- Comment #3 from Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> 2012-02-22 06:49:41 UTC --- (In reply to comment #2) > Submitted patch (pending review): > http://gcc.gnu.org/ml/fortran/2012-02/msg00089.html OK ;-) this would be a significant improvement. I think it is independent, but a better choice for the error message could be 'Symbol %s at %C has an undefined type'. The type could be implicitly or explicitly defined, that doesn't matter so much. For consistency, I believe your proposed message is fine.