1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/class/subclass/class-definition-null-proto-this.js b/js/src/tests/test262/language/statements/class/subclass/class-definition-null-proto-this.js
new file mode 100644
index 0000000000..e4d4b6a917
--- /dev/null
+++ b/js/src/tests/test262/language/statements/class/subclass/class-definition-null-proto-this.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-runtime-semantics-classdefinitionevaluation
+description: >
+  The `this` value of a null-extending class isn't automatically initialized
+info: |
+  Runtime Semantics: ClassDefinitionEvaluation
+
+  [...]
+  15. If ClassHeritageopt is present, then set F's [[ConstructorKind]] internal slot to "derived".
+  [...]
+
+  12.2.2.1 Runtime Semantics: Evaluation
+  PrimaryExpression : this
+  1. Return ? ResolveThisBinding( ).
+
+  8.3.4 ResolveThisBinding ( )
+  [...]
+  2. Return ? envRec.GetThisBinding().
+  
+  8.1.1.3.4 GetThisBinding ( )
+  [...]
+  3. If envRec.[[ThisBindingStatus]] is "uninitialized", throw a ReferenceError exception.
+  [...]
+---*/
+
+class C extends null {
+  constructor() {
+    // Use an arrow function to access the `this` binding of the class constructor.
+    assert.throws(ReferenceError, () => {
+      this;
+    });
+  }
+}
+
+assert.throws(ReferenceError, function() {
+  new C();
+});
+
+reportCompare(0, 0);