From 184835b5cd5764d1db433333c3b804cc5b50fcf8 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <293473+sandersn@users.noreply.github.com>
Date: Fri, 19 Jan 2018 13:36:01 -0800
Subject: [PATCH] Lint:document parameter name

---
 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 8a1b9015150..3e8d5b86af7 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -9338,7 +9338,7 @@ namespace ts {
                     }
                     if (discriminant) {
                         // check excess properties against discriminant type only, not the entire union
-                        return hasExcessProperties(source, discriminant, undefined, reportErrors);
+                        return hasExcessProperties(source, discriminant, /*discriminant*/ undefined, reportErrors);
                     }
                     for (const prop of getPropertiesOfObjectType(source)) {
                         if (!isKnownProperty(target, prop.escapedName, isComparingJsxAttributes)) {