From dba310949f1fc05beaa8603320a2ec6e434a4472 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Sat, 27 Aug 2016 09:50:23 -0700
Subject: [PATCH] Use 'true' and 'false' types when contextual type is
 'boolean'

---
 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 9afa1c1e2c3..b59e4eae607 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -13464,7 +13464,7 @@ namespace ts {
                     return maybeTypeOfKind(contextualType, (TypeFlags.NumberLiteral | TypeFlags.EnumLiteral));
                 }
                 if (type.flags & TypeFlags.Boolean) {
-                    return maybeTypeOfKind(contextualType, TypeFlags.BooleanLiteral) && !isTypeAssignableTo(booleanType, contextualType);
+                    return maybeTypeOfKind(contextualType, TypeFlags.BooleanLiteral);
                 }
                 if (type.flags & TypeFlags.Enum) {
                     return typeContainsLiteralFromEnum(contextualType, <EnumType>type);