From a579d41a57b4b2edcfa92371d41ed2da7fa80e77 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Thu, 3 Sep 2015 13:53:00 -0700
Subject: [PATCH] Do not add symbol if it is undefined

---
 src/compiler/checker.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index a7e9561c57f..01403c70de7 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -14166,7 +14166,10 @@ namespace ts {
                 let symbols: Symbol[] = [];
                 let name = symbol.name;
                 forEach(getSymbolLinks(symbol).containingType.types, t => {
-                    symbols.push(getPropertyOfType(t, name));
+                    let symbol = getPropertyOfType(t, name);
+                    if (symbol) {
+                        symbols.push(symbol);
+                    }
                 });
                 return symbols;
             }