From 1c7ec6b8cef4290a7b7ea5d647907a067ae98ec5 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Fri, 11 Nov 2016 07:38:44 -0800
Subject: [PATCH] Add missing node visits in forEachChild

---
 src/compiler/parser.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 7f112ae06a0..02b121c31b6 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -142,7 +142,9 @@ namespace ts {
                 return visitNode(cbNode, (<IndexedAccessTypeNode>node).objectType) ||
                     visitNode(cbNode, (<IndexedAccessTypeNode>node).indexType);
             case SyntaxKind.MappedType:
-                return visitNode(cbNode, (<MappedTypeNode>node).typeParameter) ||
+                return visitNode(cbNode, (<MappedTypeNode>node).readonlyToken) ||
+                    visitNode(cbNode, (<MappedTypeNode>node).typeParameter) ||
+                    visitNode(cbNode, (<MappedTypeNode>node).questionToken) ||
                     visitNode(cbNode, (<MappedTypeNode>node).type);
             case SyntaxKind.LiteralType:
                 return visitNode(cbNode, (<LiteralTypeNode>node).literal);