http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57697
--- Comment #11 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- The test gfortran.dg/defined_assignment_11.f90 fails on x86_64-apple-darwin10: Program received signal SIGSEGV: Segmentation fault - invalid memory reference. Valgrind reports ==30916== Invalid read of size 4 ==30916== at 0x1000021EF: MAIN__ (defined_assignment_11_db.f90:40) ==30916== by 0x100002C5B: main (defined_assignment_11_db.f90:35) ==30916== Address 0x0 is not stack'd, malloc'd or (recently) free'd It is probably related to comment #10.