From 61b3a185ce6a6d72333cb64e24b91b218d5a9e1e Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Fri, 7 Aug 2015 08:03:59 -0700
Subject: [PATCH] Making partial signature matching more inclusive

---
 src/compiler/checker.ts | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index c5c51f88b04..fd6b1f45da4 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -5390,14 +5390,12 @@ namespace ts {
             if (source === target) {
                 return Ternary.True;
             }
-            if (source.minArgumentCount !== target.minArgumentCount) {
-                return Ternary.False;
-            }
             if (source.parameters.length !== target.parameters.length ||
+                source.minArgumentCount !== target.minArgumentCount ||
                 source.hasRestParameter !== target.hasRestParameter) {
                 if (!partialMatch ||
-                    source.parameters.length < target.parameters.length ||
-                    target.hasRestParameter) {
+                    source.parameters.length < target.parameters.length && !source.hasRestParameter ||
+                    source.minArgumentCount > target.minArgumentCount) {
                     return Ternary.False;
                 }
             }