From 70feb7b10ba771a8b137b643046dbb85350cd090 Mon Sep 17 00:00:00 2001
From: Daniel Rosenwasser <Daniel.Rosenwasser@microsoft.com>
Date: Thu, 19 Apr 2018 14:29:53 -0700
Subject: [PATCH] Avoid duplicate code when checking for tagged templates.

---
 src/compiler/checker.ts | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 60fcf103041..b65d153aa45 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -17749,15 +17749,11 @@ namespace ts {
 
             let typeArguments: NodeArray<TypeNode>;
 
-            if (isTaggedTemplate) {
-                typeArguments = (node as TaggedTemplateExpression).typeArguments;
-                forEach(typeArguments, checkSourceElement);
-            }
-            else if (!isDecorator && !isJsxOpeningOrSelfClosingElement) {
+            if (!isDecorator && !isJsxOpeningOrSelfClosingElement) {
                 typeArguments = (<CallExpression>node).typeArguments;
 
                 // We already perform checking on the type arguments on the class declaration itself.
-                if ((<CallExpression>node).expression.kind !== SyntaxKind.SuperKeyword) {
+                if (isTaggedTemplate || (<CallExpression>node).expression.kind !== SyntaxKind.SuperKeyword) {
                     forEach(typeArguments, checkSourceElement);
                 }
             }