https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77382
--- Comment #1 from Gerhard Steinmetz <gerhard.steinmetz.fort...@t-online.de> --- With official releases (configured with --enable-checking=release), down to at least 4.8 : $ gfortran-6 z1.f90 z1.f90:4:0: call s internal compiler error: in expand_expr_real_1, at expr.c:9651
