re PR c++/32567 (ICE on invalid use of parameter pack)

	PR c++/32567
	* typeck.c (build_unary_op) <case PREINCREMENT_EXPR>: Return
	error_mark_node right away if build_expr_type_conversion
	returned it.

	* g++.dg/parse/crash36.C: New test.

From-SVN: r127760

gcc/cp/ChangeLog

 2007-08-24  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/32567
+	* typeck.c (build_unary_op) <case PREINCREMENT_EXPR>: Return
+	error_mark_node right away if build_expr_type_conversion
+	returned it.
+
 	PR c++/32898
 	* name-lookup.c (set_decl_namespace): lookup_qualified_name failure
 	is error_mark_node rather than NULL_TREE.

gcc/cp/typeck.c

@@ -4259,6 +4259,8 @@ build_unary_op (enum tree_code code, tree xarg, int noconvert)
 	    errstring ="no post-decrement operator for type";
 	  break;
 	}
+      else if (arg == error_mark_node)
+	return error_mark_node;
 
       /* Report something read-only.  */
 

gcc/testsuite/ChangeLog

+2007-08-24  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/32567
+	* g++.dg/parse/crash36.C: New test.
+
 2007-08-23  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* gcc.dg/pr32721.c: Updated.

gcc/testsuite/g++.dg/parse/crash36.C

+// PR c++/32567
+// { dg-do compile }
+// { dg-options "-std=c++98" }
+
+template <typename... T> struct A	// { dg-error "does not include variadic templates" }
+{
+  static T &t;				// { dg-error "not expanded with|T" }
+  static const int i = sizeof (++t);	// { dg-error "invalid use of template type parameter" }
+};
+
+int x[A <int>::i];	// { dg-error "is not an integral constant-expression" }