https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65585
Dominique d'Humieres <dominiq at lps dot ens.fr> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- gfortran is behaving as expected: iamwild is allocated on assignment as stated in the manual -frealloc-lhs An allocatable left-hand side of an intrinsic assignment is automatically (re)allocated if it is either unallocated or has a different shape. The option is enabled by default except when -std=f95 is given. See also -Wrealloc-lhs. Note this apply to full arrays only, hence the segfault if you use iamwild(:) and iamwild unallocated. > PS: took me the day to understand why my code was not working with another > compiler... :-/ If the "other compiler" is ifort, this behavior is not the default and has to be set by some option.