From 81dbf77174422daf1df71d7af46762fbb8763e02 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Wed, 21 Feb 2018 11:23:07 -0800
Subject: [PATCH] Debug.failBadSyntaxKind should always be defined and return
 'never'

---
 src/compiler/visitor.ts | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/compiler/visitor.ts b/src/compiler/visitor.ts
index 9c1462e7ec6a6..8acf068f7be18 100644
--- a/src/compiler/visitor.ts
+++ b/src/compiler/visitor.ts
@@ -1544,11 +1544,11 @@ namespace ts {
     export namespace Debug {
         let isDebugInfoEnabled = false;
 
-        export const failBadSyntaxKind = shouldAssert(AssertionLevel.Normal)
-            ? (node: Node, message?: string): void => fail(
+        export function failBadSyntaxKind(node: Node, message?: string): never {
+            return fail(
                 `${message || "Unexpected node."}\r\nNode ${formatSyntaxKind(node.kind)} was unexpected.`,
-                failBadSyntaxKind)
-            : noop;
+                failBadSyntaxKind);
+        }
 
         export const assertEachNode = shouldAssert(AssertionLevel.Normal)
             ? (nodes: Node[], test: (node: Node) => boolean, message?: string): void => assert(