PR fortran/69962 -- Patch

[Steve Kargl]

I intend to commit the following patch unless someone
speaks up before sometime tomorrow (i.e, Saturday).

2016-07-29  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/69962
	* decl.c (gfc_set_constant_character_len):  if expr is not
	constant issue an error instead of an ICE.


2016-07-29  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/69962
	* gfortran.dg/pr69962.f90: New test.


Index: gcc/fortran/decl.c
===================================================================
--- gcc/fortran/decl.c	(revision 238842)
+++ gcc/fortran/decl.c	(working copy)
@@ -1486,10 +1486,14 @@ gfc_set_constant_character_len (int len,
   gfc_char_t *s;
   int slen;
 
-  gcc_assert (expr->expr_type == EXPR_CONSTANT);
-
   if (expr->ts.type != BT_CHARACTER)
     return;
+ 
+  if (expr->expr_type != EXPR_CONSTANT)
+    {
+      gfc_error_now ("CHARACTER length must be a constant at %L", &expr->where);
+      return;
+    }
 
   slen = expr->value.character.length;
   if (len != slen)
Index: gcc/testsuite/gfortran.dg/pr69962.f90
===================================================================
--- gcc/testsuite/gfortran.dg/pr69962.f90	(nonexistent)
+++ gcc/testsuite/gfortran.dg/pr69962.f90	(working copy)
@@ -0,0 +1,6 @@
+! { dg-do compile }
+program p
+   integer :: n = 1
+   character(3), parameter :: x(2) = ['abc', 'xyz']
+   character(2), parameter :: y(2) = [x(2)(2:3), x(n)(1:2)] ! { dg-error "CHARACTER length must be a constant" }
+end

-- 
Steve