Prevent possible double inheritance (ext/opcache/tests/bug67215.phpt)

diff --git a/Zend/zend_compile.c b/Zend/zend_compile.c
index 2a428fcc8a206fa035ffaf13dfddaa49426aa8c2..f2de2c74d8acdca7dbc6bbcdca31f5a88ca9da4b 100644 (file)
--- a/Zend/zend_compile.c
+++ b/Zend/zend_compile.c
@@ -975,6 +975,10 @@ ZEND_API zend_class_entry *do_bind_inherited_class(const zend_op_array *op_array
                return NULL;
        }
 
+       if (zend_hash_exists(class_table, Z_STR_P(op2))) {
+               zend_error_noreturn(E_COMPILE_ERROR, "Cannot redeclare class %s", ce->name->val);
+       }
+
        zend_do_inheritance(ce, parent_ce);
 
        ce->refcount++;