re PR c++/77791 (ICE on invalid C++11 code with redefined function parameter:…

re PR c++/77791 (ICE on invalid C++11 code with redefined function parameter: tree check: expected tree that contains ‘decl minimal’ structure, have ‘error_mark’ in cp_parser_lambda_declarator_opt, at cp/parser.c:1011)

	PR c++/77791
	* parser.c (cp_parser_lambda_declarator_opt): Only pedwarn
	for C++11 on decls in the param_list.  Test cxx_dialect < cxx14 before
	the loop just once.

	* g++.dg/cpp0x/lambda/lambda-77791.C: New test.

From-SVN: r240751

gcc/cp/ChangeLog

 2016-10-04  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/77791
+	* parser.c (cp_parser_lambda_declarator_opt): Only pedwarn
+	for C++11 on decls in the param_list.  Test cxx_dialect < cxx14 before
+	the loop just once.
+
 	* cp-tree.h (enum cp_tree_index): Remove CPTI_JAVA_*,
 	CPTI_LANG_NAME_JAVA and CPTI_JCLASS.
 	(java_byte_type_node, java_short_type_node, java_int_type_node,

gcc/cp/parser.c

@@ -10114,10 +10114,11 @@ cp_parser_lambda_declarator_opt (cp_parser* parser, tree lambda_expr)
 
       /* Default arguments shall not be specified in the
 	 parameter-declaration-clause of a lambda-declarator.  */
-      for (tree t = param_list; t; t = TREE_CHAIN (t))
-	if (TREE_PURPOSE (t) && cxx_dialect < cxx14)
-	  pedwarn (DECL_SOURCE_LOCATION (TREE_VALUE (t)), OPT_Wpedantic,
-		   "default argument specified for lambda parameter");
+      if (cxx_dialect < cxx14)
+	for (tree t = param_list; t; t = TREE_CHAIN (t))
+	  if (TREE_PURPOSE (t) && DECL_P (TREE_VALUE (t)))
+	    pedwarn (DECL_SOURCE_LOCATION (TREE_VALUE (t)), OPT_Wpedantic,
+		     "default argument specified for lambda parameter");
 
       cp_parser_require (parser, CPP_CLOSE_PAREN, RT_CLOSE_PAREN);
 

gcc/testsuite/ChangeLog

 2016-10-04  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/77791
+	* g++.dg/cpp0x/lambda/lambda-77791.C: New test.
+
 	* g++.dg/other/java3.C: Remove.
 	* g++.dg/other/java1.C: Remove.
 	* g++.dg/other/error12.C: Remove.

gcc/testsuite/g++.dg/cpp0x/lambda/lambda-77791.C

+// PR c++/77791
+// { dg-do compile { target c++11 } }
+
+auto a = [] (int i, int i = 0) {};	// { dg-error "redefinition of" }