re PR c/65066 (ICE: Segmentation fault with -Wformat=2)

	PR c/65066
	* c-format.c (check_format_types): Handle null param.

	* gcc.dg/pr65066.c: New test.

From-SVN: r220732

gcc/c-family/ChangeLog

+2015-02-16  Marek Polacek  <polacek@redhat.com>
+
+	PR c/65066
+	* c-format.c (check_format_types): Handle null param.
+
 2015-02-13  Marek Polacek  <polacek@redhat.com>
 
 	PR c/65040

gcc/c-family/c-format.c

@@ -2492,6 +2492,7 @@ check_format_types (location_t loc, format_wanted_type *types)
 	  && TREE_CODE (cur_type) == INTEGER_TYPE
 	  && warn_format_signedness
 	  && TYPE_UNSIGNED (wanted_type)
+	  && cur_param != NULL_TREE
 	  && TREE_CODE (cur_param) == NOP_EXPR)
 	{
 	  tree t = TREE_TYPE (TREE_OPERAND (cur_param, 0));

gcc/testsuite/ChangeLog

+2015-02-16  Marek Polacek  <polacek@redhat.com>
+
+	PR c/65066
+	* gcc.dg/pr65066.c: New test.
+
 2015-02-16  Ilya Enkovich  <ilya.enkovich@intel.com>
 
 	* gcc.dg/pr65002.C: Move ...

gcc/testsuite/gcc.dg/pr65066.c

+/* PR c/65066 */
+/* { dg-do compile } */
+/* { dg-options "-Wformat=2" } */
+
+extern int sscanf (const char *restrict, const char *restrict, ...);
+int *a;
+
+void
+foo ()
+{
+  sscanf (0, "0x%x  #", a); /* { dg-warning "expects argument of type" } */
+}