From 924f536ba67a80b7cb40981f42919a719e02b440 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Wed, 5 Apr 2017 11:02:42 -0700
Subject: [PATCH] Stop looking at control flow containers for `this`

References to `this` should not continue looking outside their immediate
container to narrow. Introduced by #11458, which allows narrowing of
captured variables inside methods of class expressions.
---
 src/compiler/checker.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 7bdde91f286..fe9389bce0a 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -11009,7 +11009,7 @@ namespace ts {
                     else if (flow.flags & FlowFlags.Start) {
                         // Check if we should continue with the control flow of the containing function.
                         const container = (<FlowStart>flow).container;
-                        if (container && container !== flowContainer && reference.kind !== SyntaxKind.PropertyAccessExpression) {
+                        if (container && container !== flowContainer && reference.kind !== SyntaxKind.PropertyAccessExpression && reference.kind !== SyntaxKind.ThisKeyword) {
                             flow = container.flowNode;
                             continue;
                         }