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[patch] Fix PR c++/28387: ICE with attribute on invalid declaration
- From: Volker Reichelt <reichelt at igpm dot rwth-aachen dot de>
- To: gcc-patches at gcc dot gnu dot org
- Date: Fri, 14 Jul 2006 22:32:01 +0200 (CEST)
- Subject: [patch] Fix PR c++/28387: ICE with attribute on invalid declaration
The C++ frontend currently ICEs on the following code:
enum __attribute__((unused)) E;
bug.cc:1: error: use of enum 'E' without previous declaration
bug.cc:1: internal compiler error: tree check: expected class 'type', have 'exceptional' (error_mark) in decl_attributes, at attribs.c:281
Please submit a full bug report, [etc.]
The patch below fixes the problem by making the checks in
cplus_decl_attributes more robust.
Bootstrapped and regtested on x86_64-unknown-linux-gnu.
Ok for mainline?
Regards,
Volker
:ADDPATCH C++:
2006-07-14 Volker Reichelt <reichelt@igpm.rwth-aachen.de>
PR c++/28387
* decl2.c (cplus_decl_attributes): Check for invalid decls.
===================================================================
--- gcc/gcc/cp/decl2.c (revision 115431)
+++ gcc/gcc/cp/decl2.c (working copy)
@@ -997,7 +997,8 @@ cplus_decl_attributes (tree *decl, tree
void
cplus_decl_attributes (tree *decl, tree attributes, int flags)
{
- if (*decl == NULL_TREE || *decl == void_type_node)
+ if (*decl == NULL_TREE || *decl == void_type_node
+ || *decl == error_mark_node)
return;
if (TREE_CODE (*decl) == TEMPLATE_DECL)
===================================================================
2006-07-14 Volker Reichelt <reichelt@igpm.rwth-aachen.de>
PR c++/28387
* g++.dg/ext/attrib24.C: New test.
===================================================================
--- gcc/gcc/testsuite/g++.dg/ext/attrib24.C 2005-08-29 00:25:44 +0200
+++ gcc/gcc/testsuite/g++.dg/ext/attrib24.C 2006-07-14 16:46:59 +0200
@@ -0,0 +1,4 @@
+// PR c++/28387
+// { dg-do compile }
+
+enum __attribute__((unused)) E; // { dg-error "without previous declaration" }
===================================================================