From 50cb424c348fe82814196e9ccc04e7efb69d82ca Mon Sep 17 00:00:00 2001
From: ylavic <ylavic.dev@gmail.com>
Date: Mon, 15 Mar 2021 23:56:55 +0100
Subject: [PATCH] Test assignment from inner Value.

---
 test/unittest/valuetest.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/test/unittest/valuetest.cpp b/test/unittest/valuetest.cpp
index 00f0652..f34d4b0 100644
--- a/test/unittest/valuetest.cpp
+++ b/test/unittest/valuetest.cpp
@@ -1119,6 +1119,16 @@ TEST(Value, Array) {
     z.SetArray();
     EXPECT_TRUE(z.IsArray());
     EXPECT_TRUE(z.Empty());
+
+    // PR #1503: assign from inner Value
+    {
+        CrtAllocator a; // Free() is not a noop
+        GenericValue<UTF8<>, CrtAllocator> nullValue;
+        GenericValue<UTF8<>, CrtAllocator> arrayValue(kArrayType);
+        arrayValue.PushBack(nullValue, a);
+        arrayValue = arrayValue[0]; // shouldn't crash (use after free)
+        EXPECT_TRUE(arrayValue.IsNull());
+    }
 }
 
 TEST(Value, ArrayHelper) {