Patchwork [C++] PR 53658

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Submitter Paolo Carlini
Date June 7, 2013, 12:56 a.m.
Message ID <51B12FD5.3010007@oracle.com>
Download mbox | patch
Permalink /patch/249573/
State New
Headers show

Comments

Paolo Carlini - June 7, 2013, 12:56 a.m.
Hi,

this issue seems just another case of:

     http://gcc.gnu.org/ml/gcc-patches/2012-10/msg02472.html

thus we are ICEing because TYPE_STUB_DECL is null and we want to use 
TYPE_MAIN_DECL.

Tested x86_64-linux.

Thanks,
Paolo.

///////////////////////
/cp
2013-06-07  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/53658
	* pt.c (lookup_template_class_1): Consistently use TYPE_MAIN_DECL,
	not TYPE_STUB_DECL, to access the _DECL for a _TYPE.

/testsuite
2013-06-07  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/53658
	* g++.dg/cpp0x/alias-decl-36.C: New.
Jason Merrill - June 7, 2013, 2:42 a.m.
OK.

Jason

Patch

Index: cp/pt.c
===================================================================
--- cp/pt.c	(revision 199776)
+++ cp/pt.c	(working copy)
@@ -7561,7 +7561,7 @@  lookup_template_class_1 (tree d1, tree arglist, tr
       if (CLASS_TYPE_P (template_type) && is_dependent_type)
 	/* If the type makes use of template parameters, the
 	   code that generates debugging information will crash.  */
-	DECL_IGNORED_P (TYPE_STUB_DECL (t)) = 1;
+	DECL_IGNORED_P (TYPE_MAIN_DECL (t)) = 1;
 
       /* Possibly limit visibility based on template args.  */
       TREE_PUBLIC (type_decl) = 1;
Index: testsuite/g++.dg/cpp0x/alias-decl-36.C
===================================================================
--- testsuite/g++.dg/cpp0x/alias-decl-36.C	(revision 0)
+++ testsuite/g++.dg/cpp0x/alias-decl-36.C	(working copy)
@@ -0,0 +1,6 @@ 
+// PR c++/53658
+// { dg-do compile { target c++11 } }
+
+struct A;
+template <typename> using Foo = const A;
+template <typename Item> Foo <Item> bar();