PR c++/80241 - ICE with alignas pack expansion.

	* error.c (dump_expr): Handle TREE_LIST.
	* parser.c (cp_parser_std_attribute_list): Return error_mark if
	make_pack_expansion returns an error.

	* g++.dg/cpp0x/alignas11.C: New test.

From-SVN: r246963

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 3f87d71..6eac0ba 100644 (file)
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -3,6 +3,11 @@
        PR c++/80244 - ICE with attribute in template alias.
        * tree.c (strip_typedefs): Handle UNDERLYING_TYPE.
 
+       PR c++/80241 - ICE with alignas pack expansion.
+       * error.c (dump_expr): Handle TREE_LIST.
+       * parser.c (cp_parser_std_attribute_list): Return error_mark if
+       make_pack_expansion returns an error.
+
 2017-04-17  Bernd Edlinger  <bernd.edlinger@hotmail.de>
 
        PR c++/80287

diff --git a/gcc/cp/error.c b/gcc/cp/error.c
index f93e8b6..40a7eab 100644 (file)
--- a/gcc/cp/error.c
+++ b/gcc/cp/error.c
@@ -2822,6 +2822,10 @@ dump_expr (cxx_pretty_printer *pp, tree t, int flags)
       pp_string (pp, M_("*this"));
       break;
 
+    case TREE_LIST:
+      dump_expr_list (pp, t, flags);
+      break;
+
       /*  This list is incomplete, but should suffice for now.
          It is very important that `sorry' does not call
          `report_error_function'.  That could cause an infinite loop.  */

diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index e202ad9..5255e71 100644 (file)
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -24846,8 +24846,12 @@ cp_parser_std_attribute_list (cp_parser *parser, tree attr_ns)
            error_at (token->location,
                      "expected attribute before %<...%>");
          else
-           TREE_VALUE (attribute)
-             = make_pack_expansion (TREE_VALUE (attribute));
+           {
+             tree pack = make_pack_expansion (TREE_VALUE (attribute));
+             if (pack == error_mark_node)
+               return error_mark_node;
+             TREE_VALUE (attribute) = pack;
+           }
          token = cp_lexer_peek_token (parser->lexer);
        }
       if (token->type != CPP_COMMA)

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index ca0717e..db98764 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -3,6 +3,9 @@
        PR c++/80244 - ICE with attribute in template alias.
        * g++.dg/cpp0x/alias-decl-59.C: New test.
 
+       PR c++/80241 - ICE with alignas pack expansion.
+       * g++.dg/cpp0x/alignas11.C: New test.
+
 2017-04-17  Bernd Edlinger  <bernd.edlinger@hotmail.de>
 
        PR c++/80287

diff --git a/gcc/testsuite/g++.dg/cpp0x/alignas11.C b/gcc/testsuite/g++.dg/cpp0x/alignas11.C
new file mode 100644 (file)
index 0000000..73c54da
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/alignas11.C
@@ -0,0 +1,10 @@
+// PR c++/80241
+// { dg-do compile { target c++11 } }
+
+template <typename... T>
+struct A
+{
+  [[gnu::aligned (alignof(A))...]] char c; // { dg-error "expansion pattern" }
+};
+
+A<int> a;