Index: src/Validate/ReplaceTypedef.cpp
===================================================================
--- src/Validate/ReplaceTypedef.cpp	(revision 7b5694da33510256b93c764421e1bea0be79d671)
+++ src/Validate/ReplaceTypedef.cpp	(revision 35d1de50c31043431453e045e2651682eaf3d41c)
@@ -186,8 +186,5 @@
 
 void ReplaceTypedefCore::previsit( ast::TypeDecl const * decl ) {
-	TypedefMap::iterator iter = typedefNames.find( decl->name );
-	if ( iter != typedefNames.end() ) {
-		typedefNames.erase( iter );
-	}
+	typedefNames.erase( decl->name );
 	typedeclNames.insert( decl->name, decl );
 }