diff --git a/src/Php/CompilerBase.php b/src/Php/CompilerBase.php
index ca871ef0..f01f397c 100644
--- a/src/Php/CompilerBase.php
+++ b/src/Php/CompilerBase.php
@@ -6064,6 +6064,9 @@ class CompilerBase extends \PhpAot\Core\Translator
         }
         // 保护方法，只能当前类和子类使用
         if ($flags & Modifiers::PROTECTED) {
+            if (!$this->classDef) {
+                return false;
+            }
             return $this->isInheritedFrom($this->classDef->getNamespacedName(false), $classDef->getNamespacedName(false));
         }
         // 类外部调用，只允许调用 public 方法
diff --git a/src/Php/Generator/Utils.php b/src/Php/Generator/Utils.php
index b2b7528f..b86511eb 100644
--- a/src/Php/Generator/Utils.php
+++ b/src/Php/Generator/Utils.php
@@ -28,7 +28,7 @@ trait Utils
         }
     }
 
-    protected function genCharPtr(string $str, bool $escape = false): string
+    public function genCharPtr(string $str, bool $escape = false): string
     {
         return '"' . ($escape ? $this->escapeString($str) : $str) . '"';
     }
@@ -48,7 +48,7 @@ trait Utils
         return 'R"(' . $str . ')"';
     }
 
-    protected function escapeString(string $str): string
+    public function escapeString(string $str): string
     {
         $str = addcslashes($str, "\\\"\n\r\t\v\f\0\x01..\x1f\x7f..\xff");
         // C++ trigraph
diff --git a/src/gen_stub.php b/src/gen_stub.php
index 722b6eb8..a4b68a5a 100755
--- a/src/gen_stub.php
+++ b/src/gen_stub.php
@@ -2458,7 +2458,7 @@ class EvaluatedValue
             } elseif (!($this->expr instanceof String_)) {
                 throw new Exception("Expression at line " . $this->expr->getStartLine() . " must be a scalar string");
             }
-            $expr = preg_replace("/(^'|'$)/", '"', $expr);
+            $expr = preg_replace("/(^'|'$)/", '"', getTranslator()->escapeString($expr));
         } elseif ($this->type->isInt() or $this->type->isFloat()) {
             return strval($this->value);
         } elseif ($this->type->isBool()) {
diff --git a/tests/aot/object_property/004.phpt b/tests/aot/object_property/004.phpt
new file mode 100644
index 00000000..cb488d79
--- /dev/null
+++ b/tests/aot/object_property/004.phpt
@@ -0,0 +1,24 @@
+--TEST--
+default array property
+--FILE--
+<?php
+class Test {
+    protected string $x = '[{"label":"Option 1","value":"1"},{"label":"Option 2","value":"2"},{"label":"Option 3","value":"3"},{"label":"Option 4","value":"4"}]';
+
+    public function bar() {
+        $json = json_decode($this->x,true);
+        Assert::isArray($json);
+        Assert::count($json, 4);
+        Assert::eq($json[0]['label'], "Option 1");
+        echo "DONE\n";
+    }
+}
+
+function main() {
+    require __DIR__ . '/../../../src/Assert.php';
+    $obj = new Test;
+    $obj->bar();
+}
+?>
+--EXPECT--
+DONE
\ No newline at end of file