From 0257f4824b065c8fcb8a454a24a33def970ac09b Mon Sep 17 00:00:00 2001
From: Kristiyan Kostadinov <crisbeto@users.noreply.github.com>
Date: Tue, 12 Sep 2017 22:06:08 +0200
Subject: [PATCH] chore(tooltip): regression when trimming non-string messages
 (#7024)

Fixes a regression from f6d1078e5440531a57fd8e187ccb6720b725a6f6.
---
 src/lib/tooltip/tooltip.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib/tooltip/tooltip.ts b/src/lib/tooltip/tooltip.ts
index a941be0a341..3fa8f937ace 100644
--- a/src/lib/tooltip/tooltip.ts
+++ b/src/lib/tooltip/tooltip.ts
@@ -150,7 +150,7 @@ export class MdTooltip implements OnDestroy {
     this._ariaDescriber.removeDescription(this._elementRef.nativeElement, this._message);
 
     // If the message is not a string (e.g. number), convert it to a string and trim it.
-    this._message = value ? value.trim() : '';
+    this._message = value != null ? `${value}`.trim() : '';
     this._updateTooltipMessage();
     this._ariaDescriber.describe(this._elementRef.nativeElement, this.message);
   }