https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71935
--- Comment #2 from kargl at gcc dot gnu.org --- Index: check.c =================================================================== --- check.c (revision 238385) +++ check.c (working copy) @@ -4278,7 +4278,7 @@ is_c_interoperable (gfc_expr *expr, cons } if (expr->ts.u.cl && expr->ts.u.cl->length - && !gfc_simplify_expr (expr, 0)) + && !gfc_simplify_expr (expr->ts.u.cl->length, 0)) gfc_internal_error ("is_c_interoperable(): gfc_simplify_expr failed"); if (!c_loc && expr->ts.u.cl Weird that an array reference out-of-bounds is only an error.