From ea50e1def76edd90cf33dae263abe8f71dfde16f Mon Sep 17 00:00:00 2001
From: Robert Manuszewski <Robert.Manuszewski@epicgames.com>
Date: Tue, 5 Aug 2014 13:03:54 -0400
Subject: [PATCH] Added code to handle COM crashes when detecting physical
 processor count in UBT

[CL 2244406 by Robert Manuszewski in Main branch]
---
 .../UnrealBuildTool/System/LocalExecutor.cs      | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/Engine/Source/Programs/UnrealBuildTool/System/LocalExecutor.cs b/Engine/Source/Programs/UnrealBuildTool/System/LocalExecutor.cs
index aea663c915b1..b53c6ef40d46 100644
--- a/Engine/Source/Programs/UnrealBuildTool/System/LocalExecutor.cs
+++ b/Engine/Source/Programs/UnrealBuildTool/System/LocalExecutor.cs
@@ -339,9 +339,21 @@ namespace UnrealBuildTool
 			int NumCores = 0;
 			if (!Utils.IsRunningOnMono)
 			{
-				foreach(var Item in new System.Management.ManagementObjectSearcher("Select * from Win32_Processor").Get())
+				try
 				{
-					NumCores += int.Parse(Item["NumberOfCores"].ToString());
+					using (var Mos = new System.Management.ManagementObjectSearcher("Select * from Win32_Processor"))
+					{
+						var MosCollection = Mos.Get();
+						foreach (var Item in MosCollection)
+						{
+							NumCores += int.Parse(Item["NumberOfCores"].ToString());
+						}
+					}
+				}
+				catch (Exception Ex)
+				{
+					Log.TraceWarning("Unable to get the number of Cores: {0}", Ex.ToString());
+					Log.TraceWarning("Falling back to processor count.");
 				}
 			}
 			// On some systems this requires a hot fix to work so we fall back to using the (logical) processor count.