From d37fdfe213a64105e7ce41797b202a7f81e9d878 Mon Sep 17 00:00:00 2001
From: Cyrus Najmabadi <cyrusn@microsoft.com>
Date: Mon, 9 Feb 2015 14:12:32 -0800
Subject: [PATCH] Add additional asserts.

---
 src/compiler/parser.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index d58a9f15105..3d512a88e56 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -508,6 +508,7 @@ module ts {
         return;
 
         function visitNode(child: IncrementalNode) {
+            Debug.assert(child.pos <= child.end);
             if (child.pos > changeRangeOldEnd) {
                 // Node is entirely past the change range.  We need to move both its pos and 
                 // end, forward or backward appropriately.
@@ -531,9 +532,11 @@ module ts {
             }
 
             // Otherwise, the node is entirely before the change range.  No need to do anything with it.
+            Debug.assert(fullEnd < changeStart);
         }
 
         function visitArray(array: IncrementalNodeArray) {
+            Debug.assert(array.pos <= array.end);
             if (array.pos > changeRangeOldEnd) {
                 // Array is entirely after the change range.  We need to move it, and move any of
                 // its children.