From: Nikita Popov <nikita.ppv@gmail.com>
Date: Thu, 18 Feb 2021 15:44:10 +0000 (+0100)
Subject: Fix crash during default value evaluation
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=a843c8a4b6c3c066185ae6ed9535fd342643c14c;p=php

Fix crash during default value evaluation
---

diff --git a/Zend/zend_compile.c b/Zend/zend_compile.c
index df88d34a6f..15bc64783d 100644
--- a/Zend/zend_compile.c
+++ b/Zend/zend_compile.c
@@ -1512,6 +1512,11 @@ static bool zend_try_ct_eval_const(zval *zv, zend_string *name, bool is_fully_qu
 
 static inline bool zend_is_scope_known() /* {{{ */
 {
+	if (!CG(active_op_array)) {
+		/* This can only happen when evaluating a default value string. */
+		return 0;
+	}
+
 	if (CG(active_op_array)->fn_flags & ZEND_ACC_CLOSURE) {
 		/* Closures can be rebound to a different scope */
 		return 0;