http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55483
--- Comment #2 from Jack Howarth <howarth at nitro dot med.uc.edu> 2012-12-10 18:49:46 UTC --- This one doesn't reproduce on x86_64 Fedora 15 but appears to be a tuning issue. If I append -mtune=generic to the compilation of gfortran.dg/class_optional_2.f90 at -O0 on x86_64-apple-darwin12, the resulting executable runs fine. Likewise, if I append -mtune=core2 to the compilation of gfortran.dg/class_optional_2.f90 at -O0 on x86_64 Fedora 15, the test case fails like on x86_64 darwin.
