Janus, With the patch in http://gcc.gnu.org/ml/fortran/2010-09/msg00036/pr44541_v2.diff the test in pr44465 (comments #0 and #2) segfault: [macbook] f90/bug% gfc -O3 pr44465.f90 [macbook] f90/bug% a.out shape Segmentation fault Cheers, Dominique