[Committed] PR fortran/85001 -- Fix a non non-null pointer issue

[Steve Kargl]

The following patch fixes an assign of a valid pointer to
to pointer, but what should have been assigned is NULL;

2018-03-20  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/85001
	* interface.c (symbol_rank): Remove bogus null pointer check that
	crept in when translating a ternary operator into an if-else 
	constructor.

2018-03-20  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/85001
	* gfortran.dg/interface_41.f90: New test.

Index: gcc/fortran/interface.c
===================================================================
--- gcc/fortran/interface.c	(revision 258646)
+++ gcc/fortran/interface.c	(working copy)
@@ -1268,7 +1268,7 @@ symbol_rank (gfc_symbol *sym)
 {
   gfc_array_spec *as = NULL;
 
-  if (sym->ts.type == BT_CLASS && CLASS_DATA (sym) && CLASS_DATA (sym)->as)
+  if (sym->ts.type == BT_CLASS && CLASS_DATA (sym))
     as = CLASS_DATA (sym)->as;
   else
     as = sym->as;
Index: gcc/testsuite/gfortran.dg/interface_41.f90
===================================================================
--- gcc/testsuite/gfortran.dg/interface_41.f90	(nonexistent)
+++ gcc/testsuite/gfortran.dg/interface_41.f90	(working copy)
@@ -0,0 +1,19 @@
+! { dg-do compile }
+! PR fortran/85001 
+! Contributed by Gerhard Steinmetz.
+program p
+   type t
+   end type
+   call s
+contains
+   real function f(x)
+      class(t) :: x
+      dimension :: x(:)
+      f = 1.0
+   end
+   subroutine s
+      type(t) :: x(2)
+      real :: z
+      z = f(x)     ! { dg-error "Rank mismatch in argument" }
+   end
+end

-- 
Steve