https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66045
kargl at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P3 |P4 Status|UNCONFIRMED |NEW Last reconfirmed| |2015-05-07 CC| |kargl at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #1 from kargl at gcc dot gnu.org --- Confirmed. This patch (watch copy-n-paste tab corruption) Index: expr.c =================================================================== --- expr.c (revision 222869) +++ expr.c (working copy) @@ -3118,19 +3118,22 @@ gfc_check_assign (gfc_expr *lvalue, gfc_ bad_proc = true; /* (ii) The assignment is in the main program; or */ - if (gfc_current_ns->proc_name->attr.is_main_program) + if (gfc_current_ns->proc_name + && gfc_current_ns->proc_name->attr.is_main_program) bad_proc = true; /* (iii) A module or internal procedure... */ - if ((gfc_current_ns->proc_name->attr.proc == PROC_INTERNAL - || gfc_current_ns->proc_name->attr.proc == PROC_MODULE) + if (gfc_current_ns->proc_name + && (gfc_current_ns->proc_name->attr.proc == PROC_INTERNAL + || gfc_current_ns->proc_name->attr.proc == PROC_MODULE) && gfc_current_ns->parent && (!(gfc_current_ns->parent->proc_name->attr.function || gfc_current_ns->parent->proc_name->attr.subroutine) || gfc_current_ns->parent->proc_name->attr.is_main_program)) { /* ... that is not a function... */ - if (!gfc_current_ns->proc_name->attr.function) + if (gfc_current_ns->proc_name + && !gfc_current_ns->proc_name->attr.function) bad_proc = true; /* ... or is not an entry and has a different name. */ yields gfc6 -c po.f90 po.f90:3:19: integer :: null=null() 1 Error: NULL appears on right-hand side in assignment at (1)