re PR c++/77752 (ICE on C++ code on x86_64-linux-gnu (internal compiler error:…

re PR c++/77752 (ICE on C++ code on x86_64-linux-gnu (internal compiler error: Segmentation fault, build_list_conv, implicit_conversion))

/cp
2017-03-21  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/77752
	* name-lookup.c (pushtag_1): Add check for bogus, non template,
	std::initializer_list.

/testsuite
2017-03-21  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/77752
	* g++.dg/cpp0x/initlist97.C: New.
	* g++.dg/cpp0x/initlist85.C: Update.

From-SVN: r246310

gcc/cp/ChangeLog

+2017-03-21  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/77752
+	* name-lookup.c (pushtag_1): Add check for bogus, non template,
+	std::initializer_list.
+
 2017-03-21  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/35878

gcc/cp/name-lookup.c

@@ -6207,6 +6207,15 @@ pushtag_1 (tree name, tree type, tag_scope scope)
 	  decl = pushdecl_with_scope_1 (decl, b, /*is_friend=*/false);
 	  if (decl == error_mark_node)
 	    return decl;
+
+	  if (DECL_CONTEXT (decl) == std_node
+	      && strcmp (TYPE_NAME_STRING (type), "initializer_list") == 0
+	      && !CLASSTYPE_TEMPLATE_INFO (type))
+	    {
+	      error ("declaration of std::initializer_list does not match "
+		     "#include <initializer_list>, isn't a template");
+	      return error_mark_node;
+	    }
 	}
 
       if (! in_class)

gcc/testsuite/ChangeLog

+2017-03-21  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/77752
+	* g++.dg/cpp0x/initlist97.C: New.
+	* g++.dg/cpp0x/initlist85.C: Update.
+
 2017-03-21  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c/67338

gcc/testsuite/g++.dg/cpp0x/initlist85.C

@@ -3,14 +3,12 @@
 
 namespace std
 {
-  struct initializer_list {};	// { dg-message "initializer_list" }
+  struct initializer_list {};  // { dg-error "declaration" }
 }
 
 void foo(std::initializer_list &);
 
 void f()
 {
-  foo({1, 2});
+  foo({1, 2});  // { dg-error "invalid initialization" }
 }
-
-// { dg-prune-output "compilation terminated" }

gcc/testsuite/g++.dg/cpp0x/initlist97.C

+// PR c++/77752
+// { dg-do compile { target c++11 } }
+
+namespace std {
+  class initializer_list;  // { dg-error "declaration" }
+}
+void f(std::initializer_list l) { f({2}); }  // { dg-error "incomplete type" }