From 7d09f268c40fb63b39d186718ddf2f5c804b9723 Mon Sep 17 00:00:00 2001
From: Vladimir Matveev <vladima@microsoft.com>
Date: Thu, 22 Oct 2015 09:50:38 -0700
Subject: [PATCH] defer allocation of error message text in binder

---
 src/compiler/binder.ts | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 9126bc465bd..3d7d980706b 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -1410,9 +1410,16 @@ namespace ts {
         }
 
         function popImplicitLabel(implicitLabelIndex: number, outerState: Reachability): void {
-            Debug.assert(labelStack.length === implicitLabelIndex + 1, `Label stack: ${labelStack.length}, index:${implicitLabelIndex}`);
+            if (labelStack.length !== implicitLabelIndex + 1) {
+                Debug.assert(false, `Label stack: ${labelStack.length}, index:${implicitLabelIndex}`);
+            }
+
             let i = implicitLabels.pop();
-            Debug.assert(implicitLabelIndex === i, `i: ${i}, index: ${implicitLabelIndex}`);
+
+            if (implicitLabelIndex !== i) {
+                Debug.assert(false, `i: ${i}, index: ${implicitLabelIndex}`);
+            }
+
             setCurrentStateAtLabel(labelStack.pop(), outerState, /*name*/ undefined);
         }