From 2ca6164fea89ca344b04ee775a472564ae836511 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 16 Feb 2017 17:04:30 -0800
Subject: [PATCH] Default contextual 'this' type is containing object literal

---
 src/compiler/checker.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 898b7b4d539..3949a65eea8 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -11230,6 +11230,9 @@ namespace ts {
                         }
                         objectLiteral = <ObjectLiteralExpression>objectLiteral.parent.parent;
                     }
+                    // There was no contextual ThisType<T> for the containing object literal, so the contextual type
+                    // for 'this' is the type of the object literal itself.
+                    return checkExpressionCached(containingLiteral);
                 }
             }
             return undefined;