http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57978
--- Comment #7 from Tobias Burnus <burnus at gcc dot gnu.org> --- (In reply to Joost VandeVondele from comment #6) > for 4.8 gives a segfault Which has seemingly be fixed in GCC 4.9. > for 4.9 reports: > allocate (diffdays, source=NO_DAY) > 1 > Error: Array specification required in ALLOCATE statement at (1) I think the compiler is right that your code is invalid Fortran 2003. However, if NO_DAY is an array, it is valid Fortran 2008. That's tracked in PR44672
