re PR c++/59111 ([c++11] ICE on invalid usage of auto in return type)

PR c++/59111
cp/
	* search.c (lookup_conversions): Return NULL_TREE if !CLASS_TYPE_P.
testsuite/
	* g++.dg/cpp0x/pr59111.C: New test.
	* g++.dg/cpp1y/pr59110.C: New test.

From-SVN: r206177

gcc/cp/ChangeLog

@@ -1,3 +1,8 @@
+2013-12-23  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/59111
+	* search.c (lookup_conversions): Return NULL_TREE if !CLASS_TYPE_P.
+
 2013-12-20  Trevor saunders  <tsaunders@mozilla.com>
 
 	* semantics.c (build_anon_member_initialization): Replace

gcc/cp/search.c

@@ -2506,7 +2506,7 @@ lookup_conversions (tree type)
   tree list = NULL_TREE;
 
   complete_type (type);
-  if (!TYPE_BINFO (type))
+  if (!CLASS_TYPE_P (type) || !TYPE_BINFO (type))
     return NULL_TREE;
 
   lookup_conversions_r (TYPE_BINFO (type), 0, 0,

gcc/testsuite/ChangeLog

@@ -1,3 +1,9 @@
+2013-12-23  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/59111
+	* g++.dg/cpp0x/pr59111.C: New test.
+	* g++.dg/cpp1y/pr59110.C: New test.
+
 2013-12-22  Uros Bizjak  <ubizjak@gmail.com>
 
 	* gcc.target/x86_64/abi/callabi/func-2a.c (dg-do): Remove

gcc/testsuite/g++.dg/cpp0x/pr59111.C

@@ -0,0 +1,5 @@
+// PR c++/59111
+// { dg-do compile { target c++11 } }
+
+auto& foo();	// { dg-error "type specifier without trailing return type" }
+int i = foo();	// { dg-error "cannot convert" }

gcc/testsuite/g++.dg/cpp1y/pr59110.C

@@ -0,0 +1,4 @@
+// PR c++/59110
+// { dg-options "-std=c++1y" }
+
+int i = *(auto*)0; // { dg-error "cannot convert" }