From 6038ea09c9e80972ac37817dd69044e8bd187f30 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Mon, 8 May 2017 10:40:24 -0700
Subject: [PATCH] Simplify JS check in index constraint error reporting

Any declaration that is a BinaryExpression is a special javascript
declaration, and all JS declarations that are checked for index
constraint compatibility are, in fact, relevant.
---
 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 d3e2233bc44..a93585156bb 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -20339,7 +20339,7 @@ namespace ts {
                 // this allows to rule out cases when both property and indexer are inherited from the base class
                 let errorNode: Node;
                 if (propDeclaration &&
-                    (getSpecialPropertyAssignmentKind(propDeclaration as BinaryExpression) === SpecialPropertyAssignmentKind.ThisProperty ||
+                    (propDeclaration.kind === SyntaxKind.BinaryExpression ||
                      propDeclaration.name.kind === SyntaxKind.ComputedPropertyName ||
                      prop.parent === containingType.symbol)) {
                     errorNode = propDeclaration;