File php7-Fix-bug-66773-66862.patch of Package php7.24160

From 2a75f5026a47099f585e29c5a9d8a2989dab42af Mon Sep 17 00:00:00 2001
From: Nikita Popov <nikic@php.net>
Date: Sat, 8 Oct 2016 16:56:17 +0200
Subject: [PATCH] Fix bug #66773, #66862

This a partial backport of 8754b19. It
a) fixes the class/function/constant import table confusion in the
   namespaced case, and
b) restricts conflict checks to a single file based on a filename
   pointer comparison.

It does not fix the issues with filename reuse (e.g. due to eval)
and late-bound classes. This part of the change requires globals
changes.
diff --git a/Zend/zend_compile.c b/Zend/zend_compile.c
index 53cafcb56d..eb373906eb 100644
--- a/Zend/zend_compile.c
+++ b/Zend/zend_compile.c
@@ -5499,6 +5499,41 @@ static void zend_check_already_in_use(uint32_t type, zend_string *old_name, zend
 }
 /* }}} */
 
+static void zend_check_use_conflict(
+		uint32_t type, zend_string *old_name, zend_string *new_name, zend_string *lookup_name) {
+	switch (type) {
+		case T_CLASS:
+		{
+			zend_class_entry *ce = zend_hash_find_ptr(CG(class_table), lookup_name);
+			if (ce && ce->type == ZEND_USER_CLASS
+				&& ce->info.user.filename == CG(compiled_filename)
+			) {
+				zend_check_already_in_use(type, old_name, new_name, lookup_name);
+			}
+			break;
+		}
+		case T_FUNCTION:
+		{
+			zend_function *fn = zend_hash_find_ptr(CG(function_table), lookup_name);
+			if (fn && fn->type == ZEND_USER_FUNCTION
+				&& fn->op_array.filename == CG(compiled_filename)
+			) {
+				zend_check_already_in_use(type, old_name, new_name, lookup_name);
+			}
+			break;
+		}
+		case T_CONST:
+		{
+			zend_string *filename = zend_hash_find_ptr(&CG(const_filenames), lookup_name);
+			if (filename && filename == CG(compiled_filename)) {
+				zend_check_already_in_use(type, old_name, new_name, lookup_name);
+			}
+			break;
+		}
+		EMPTY_SWITCH_DEFAULT_CASE()
+	}
+}
+
 void zend_compile_use(zend_ast *ast) /* {{{ */
 {
 	zend_ast_list *list = zend_ast_get_list(ast);
@@ -5555,43 +5590,11 @@ void zend_compile_use(zend_ast *ast) /* {{{ */
 			ZSTR_VAL(ns_name)[ZSTR_LEN(current_ns)] = '\\';
 			memcpy(ZSTR_VAL(ns_name) + ZSTR_LEN(current_ns) + 1, ZSTR_VAL(lookup_name), ZSTR_LEN(lookup_name));
 
-			if (zend_hash_exists(CG(class_table), ns_name)) {
-				zend_check_already_in_use(type, old_name, new_name, ns_name);
-			}
+			zend_check_use_conflict(type, old_name, new_name, ns_name);
 
 			zend_string_free(ns_name);
 		} else {
-			switch (type) {
-				case T_CLASS:
-				{
-					zend_class_entry *ce = zend_hash_find_ptr(CG(class_table), lookup_name);
-					if (ce && ce->type == ZEND_USER_CLASS
-						&& ce->info.user.filename == CG(compiled_filename)
-					) {
-						zend_check_already_in_use(type, old_name, new_name, lookup_name);
-					}
-					break;
-				}
-				case T_FUNCTION:
-				{
-					zend_function *fn = zend_hash_find_ptr(CG(function_table), lookup_name);
-					if (fn && fn->type == ZEND_USER_FUNCTION
-						&& fn->op_array.filename == CG(compiled_filename)
-					) {
-						zend_check_already_in_use(type, old_name, new_name, lookup_name);
-					}
-					break;
-				}
-				case T_CONST:
-				{
-					zend_string *filename = zend_hash_find_ptr(&CG(const_filenames), lookup_name);
-					if (filename && filename == CG(compiled_filename)) {
-						zend_check_already_in_use(type, old_name, new_name, lookup_name);
-					}
-					break;
-				}
-				EMPTY_SWITCH_DEFAULT_CASE()
-			}
+			zend_check_use_conflict(type, old_name, new_name, lookup_name);
 		}
 
 		zend_string_addref(old_name);
-- 
2.13.5