From 520d07d86a7520c970e18480ed0237c6253bd097 Mon Sep 17 00:00:00 2001
From: Stefan Marr <gron@php.net>
Date: Sun, 4 Mar 2012 19:34:19 +0000
Subject: [PATCH] Fixed Bug #61052 (Missing error check in trait 'insteadof'
 clause)

---
 Zend/tests/traits/bug61052.phpt | 18 ++++++++++++++++++
 Zend/zend_compile.c             | 17 ++++++++++++++++-
 2 files changed, 34 insertions(+), 1 deletion(-)
 create mode 100644 Zend/tests/traits/bug61052.phpt

diff --git a/Zend/tests/traits/bug61052.phpt b/Zend/tests/traits/bug61052.phpt
new file mode 100644
index 00000000000..421e9074e59
--- /dev/null
+++ b/Zend/tests/traits/bug61052.phpt
@@ -0,0 +1,18 @@
+--TEST--
+Bug #61052 (missing error check in trait 'insteadof' clause)
+--FILE--
+<?php
+trait T1 {
+  function foo(){ echo "T1\n"; }
+}
+trait T2 {
+  function foo(){ echo "T2\n"; }
+}
+class C {
+  use T1, T2 {
+    T1::foo insteadof T1;
+  }
+}
+C::foo();
+--EXPECTF--
+Fatal error: Inconsistent insteadof definition. The method foo is to be used from T1, but T1 is also on the exclude list in %s on line %d
diff --git a/Zend/zend_compile.c b/Zend/zend_compile.c
index 88c5020a29f..c3c35eb5fc6 100644
--- a/Zend/zend_compile.c
+++ b/Zend/zend_compile.c
@@ -3984,13 +3984,28 @@ static void zend_traits_init_trait_structures(zend_class_entry *ce TSRMLS_DC) /*
 			
 				/** With the other traits, we are more permissive.
 					We do not give errors for those. This allows to be more
-					defensive in such definitions. */
+					defensive in such definitions.
+					However, we want to make sure that the insteadof declartion
+					is consistent in itself.
+				 */
 				j = 0;
 				while (cur_precedence->exclude_from_classes[j]) {
 					char* class_name = (char*)cur_precedence->exclude_from_classes[j];
 					zend_uint name_length = strlen(class_name);
 
 					cur_precedence->exclude_from_classes[j] = zend_fetch_class(class_name, name_length, ZEND_FETCH_CLASS_TRAIT TSRMLS_CC);
+					
+					/* make sure that the trait method is not from a class mentioned in
+					 exclude_from_classes, for consistency */
+					if (cur_precedence->trait_method->ce == cur_precedence->exclude_from_classes[i]) {
+						zend_error(E_COMPILE_ERROR,
+								   "Inconsistent insteadof definition. " 
+								   "The method %s is to be used from %s, but %s is also on the exclude list",
+								   cur_method_ref->method_name,
+								   cur_precedence->trait_method->ce->name,
+								   cur_precedence->trait_method->ce->name);
+					}
+					
 					efree(class_name);
 					j++;
 				}