From a73b03edea9b988e079b3c8c2018321e834ff78f Mon Sep 17 00:00:00 2001
From: Sara Golemon <pollita@php.net>
Date: Thu, 12 May 2016 02:28:57 +0000
Subject: [PATCH] Fix serializing ZEND_AST_SHELL_EXEC

Currently, `foo` is reserialized as `'foo'` due to misuse of zend_ast_export().
ZEND_AST_SHELL_EXEC can only contain ZEND_AST_ZVAL(string) or ZEND_AST_ENCAPS_LIST,
so just handle the ZEND_AST_ZVAL(string) case directly.
---
 Zend/tests/ast_serialize_backtick_literal.phpt | 11 +++++++++++
 Zend/zend_ast.c                                |  6 +++++-
 2 files changed, 16 insertions(+), 1 deletion(-)
 create mode 100644 Zend/tests/ast_serialize_backtick_literal.phpt

diff --git a/Zend/tests/ast_serialize_backtick_literal.phpt b/Zend/tests/ast_serialize_backtick_literal.phpt
new file mode 100644
index 0000000000..03bdc298ac
--- /dev/null
+++ b/Zend/tests/ast_serialize_backtick_literal.phpt
@@ -0,0 +1,11 @@
+--TEST--
+Serialization of backtick literal is incorrect
+--INI--
+zend.assertions=1
+--FILE--
+<?php
+
+assert_options(ASSERT_WARNING);
+assert(false && `echo -n ""`);
+--EXPECTF--
+Warning: assert(): assert(false && `echo -n ""`) failed in %s/ast_serialize_backtick_literal.php on line 4
diff --git a/Zend/zend_ast.c b/Zend/zend_ast.c
index 3772887092..11980f10ee 100644
--- a/Zend/zend_ast.c
+++ b/Zend/zend_ast.c
@@ -1217,7 +1217,11 @@ simple_list:
 			if (ast->child[0]->kind == ZEND_AST_ENCAPS_LIST) {
 				zend_ast_export_encaps_list(str, '`', (zend_ast_list*)ast->child[0], indent);
 			} else {
-				zend_ast_export_ex(str, ast->child[0], 0, indent);
+				zval *zv;
+				ZEND_ASSERT(ast->child[0]->kind == ZEND_AST_ZVAL);
+				zv = zend_ast_get_zval(ast->child[0]);
+				ZEND_ASSERT(Z_TYPE_P(zv) == IS_STRING);
+				zend_ast_export_qstr(str, '`', Z_STR_P(zv));
 			}
 			smart_str_appendc(str, '`');
 			break;
-- 
2.40.0