re PR c++/78341 (ICE on invalid C++ code on x86_64-linux-gnu (internal compiler…

re PR c++/78341 (ICE on invalid C++ code on x86_64-linux-gnu  (internal compiler error: in cp_parser_std_attribute_spec, at cp/parser.c:24597))

	PR c++/78341
	* parser.c (cp_parser_std_attribute_spec): Remove over-eager
	assertion.  Formatting fix.

	* g++.dg/cpp0x/pr78341.C: New test.

From-SVN: r244329

gcc/cp/ChangeLog

 2017-01-11  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/78341
+	* parser.c (cp_parser_std_attribute_spec): Remove over-eager
+	assertion.  Formatting fix.
+
 	PR c++/72813
 	* decl2.c (c_parse_final_cleanups): Set flag_syntax_only to 1 after
 	writing PCH file.

gcc/cp/parser.c

@@ -24925,11 +24925,7 @@ cp_parser_std_attribute_spec (cp_parser *parser)
 
       if (!cp_parser_parse_definitely (parser))
 	{
-	  gcc_assert (alignas_expr == error_mark_node
-		      || alignas_expr == NULL_TREE);
-
-	  alignas_expr =
-	    cp_parser_assignment_expression (parser);
+	  alignas_expr = cp_parser_assignment_expression (parser);
 	  if (alignas_expr == error_mark_node)
 	    cp_parser_skip_to_end_of_statement (parser);
 	  if (alignas_expr == NULL_TREE

gcc/testsuite/ChangeLog

+2017-01-11  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/78341
+	* g++.dg/cpp0x/pr78341.C: New test.
+
 2017-01-11  Martin Sebor  <msebor@redhat.com>
 
 	PR c/78768

gcc/testsuite/g++.dg/cpp0x/pr78341.C

+// PR c++/78341
+// { dg-do compile { target c++11 } }
+
+alignas (alignas double // { dg-error "" }