From 7ad88a9406f66d9d7ee7318e8e4cf3d0d460afd2 Mon Sep 17 00:00:00 2001
From: Steve Sanderson <SteveSandersonMS@users.noreply.github.com>
Date: Fri, 16 Feb 2018 10:08:05 +0000
Subject: [PATCH] Fix ArrayBuilder capacity expansion bug

---
 src/Microsoft.AspNetCore.Blazor/RenderTree/ArrayBuilder.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Microsoft.AspNetCore.Blazor/RenderTree/ArrayBuilder.cs b/src/Microsoft.AspNetCore.Blazor/RenderTree/ArrayBuilder.cs
index 0350c726e3..979ec0df86 100644
--- a/src/Microsoft.AspNetCore.Blazor/RenderTree/ArrayBuilder.cs
+++ b/src/Microsoft.AspNetCore.Blazor/RenderTree/ArrayBuilder.cs
@@ -57,7 +57,7 @@ namespace Microsoft.AspNetCore.Blazor.RenderTree
         {
             if (_itemsInUse == _items.Length)
             {
-                SetCapacity(_itemsInUse * 2, preserveContents: true);
+                SetCapacity(_items.Length * 2, preserveContents: true);
             }
 
             var indexOfAppendedItem = _itemsInUse++;
@@ -72,7 +72,7 @@ namespace Microsoft.AspNetCore.Blazor.RenderTree
             var requiredCapacity = _itemsInUse + length;
             if (_items.Length < requiredCapacity)
             {
-                var candidateCapacity = _itemsInUse * 2;
+                var candidateCapacity = _items.Length * 2;
                 while (candidateCapacity < requiredCapacity)
                 {
                     candidateCapacity *= 2;