From 5cb75c525fc55fb01033e38277e10a30111fae62 Mon Sep 17 00:00:00 2001
From: Jacek Caban <jacek@codeweavers.com>
Date: Tue, 28 Aug 2012 21:33:57 +0200
Subject: [PATCH] widl: Fail with error on an attempt to inherit interface from
 itself.

---
 tools/widl/parser.y | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/widl/parser.y b/tools/widl/parser.y
index 55b2df90db8..616a538ae9d 100644
--- a/tools/widl/parser.y
+++ b/tools/widl/parser.y
@@ -884,6 +884,8 @@ interfacehdr: attributes interface		{ $$.interface = $2;
 
 interfacedef: interfacehdr inherit
 	  '{' int_statements '}' semicolon_opt	{ $$ = $1.interface;
+						  if($$ == $2)
+						    error_loc("Interface can't inherit from itself\n");
 						  type_interface_define($$, $2, $4);
 						  pointer_default = $1.old_pointer_default;
 						}