https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69360
kargl at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |kargl at gcc dot gnu.org --- Comment #5 from kargl at gcc dot gnu.org --- (In reply to John Northall from comment #4) > O dear - that makes gfortran unusable on many existing codes - not really > satisfactory is it? > John > gfortran is fairly good at finding bugs in a user's program if one asks gfortran to do so. Add -fcheck=all to your options. At line 21 of file setmid.f Fortran runtime error: Index '155' of dimension 1 of array 'xym' above upper bound of 1 Now, you have an opportunity to fix your code.