Core 903

	Core 903
	* call.c (null_ptr_cst_p): Check char_type_p.

From-SVN: r240329

gcc/cp/ChangeLog

+2016-09-21  Jason Merrill  <jason@redhat.com>
+
+	Core 903
+	* call.c (null_ptr_cst_p): Check char_type_p.
+
 2016-09-21  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/77651

gcc/cp/call.c

@@ -527,6 +527,7 @@ null_ptr_cst_p (tree t)
     {
       /* Core issue 903 says only literal 0 is a null pointer constant.  */
       if (TREE_CODE (type) == INTEGER_TYPE
+	  && !char_type_p (type)
 	  && TREE_CODE (t) == INTEGER_CST
 	  && integer_zerop (t)
 	  && !TREE_OVERFLOW (t))

gcc/testsuite/g++.dg/cpp0x/nullptr36.C

+// { dg-do compile { target c++11 } }
+
+void *p = '\0';			// { dg-error "invalid conversion" }