re PR c++/27716 (ICE with invalid assignment)

	PR c++/27716
	* typeck.c (build_modify_expr): Test arguments for error_operand_p.

	* g++.dg/other/assign1.C: New test.

From-SVN: r113990

gcc/cp/ChangeLog

 2006-05-22  Volker Reichelt  <reichelt@igpm.rwth-aachen.de>
 
+	PR c++/27716
+	* typeck.c (build_modify_expr): Test arguments for error_operand_p.
+
 	* decl.c (grokdeclarator): Return error_mark_node instead of NULL_TREE.
 
 2006-05-21  Mark Mitchell  <mark@codesourcery.com>

gcc/cp/typeck.c

@@ -5502,7 +5502,7 @@ build_modify_expr (tree lhs, enum tree_code modifycode, tree rhs)
   bool plain_assign = (modifycode == NOP_EXPR);
 
   /* Avoid duplicate error messages from operands that had errors.  */
-  if (lhs == error_mark_node || rhs == error_mark_node)
+  if (error_operand_p (lhs) || error_operand_p (rhs))
     return error_mark_node;
 
   /* Handle control structure constructs used as "lvalues".  */

gcc/testsuite/ChangeLog

+2006-05-22  Volker Reichelt  <reichelt@igpm.rwth-aachen.de>
+
+	PR c++/27716
+	* g++.dg/other/assign1.C: New test.
+
 2006-05-22  Kazu Hirata  <kazu@codesourcery.com>
 
 	PR target/27266

gcc/testsuite/g++.dg/other/assign1.C

+// PR c++/27716
+// { dg-do compile }
+
+int foo()
+{
+  return i ""= i;  // { dg-error "not declared|string constant" }
+}