From e5c5a35e3a73c28fcc3432fb795fe10cf3ca1fa3 Mon Sep 17 00:00:00 2001
From: Johannes Rieken <johannes.rieken@gmail.com>
Date: Thu, 16 Nov 2017 15:03:26 +0100
Subject: [PATCH] fix error when a symbol provider doesn't return a result

---
 src/vs/workbench/api/node/extHostLanguageFeatures.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/vs/workbench/api/node/extHostLanguageFeatures.ts b/src/vs/workbench/api/node/extHostLanguageFeatures.ts
index fe8a177ca07..05756e0d7a9 100644
--- a/src/vs/workbench/api/node/extHostLanguageFeatures.ts
+++ b/src/vs/workbench/api/node/extHostLanguageFeatures.ts
@@ -422,7 +422,9 @@ class NavigateTypeAdapter {
 				}
 			}
 		}).then(() => {
-			this._resultCache[result._id] = [result.symbols[0]._id, result.symbols[result.symbols.length - 1]._id];
+			if (result.symbols.length > 0) {
+				this._resultCache[result._id] = [result.symbols[0]._id, result.symbols[result.symbols.length - 1]._id];
+			}
 			return result;
 		});
 	}