From fc177587f34f90ae3285a5ea757a81a317b41769 Mon Sep 17 00:00:00 2001
From: Travis Illig <travis.illig@fiserv.com>
Date: Thu, 16 Aug 2018 08:25:21 -0700
Subject: [PATCH] Memory optimization from #919:
 Autofac.Core.Resolving.CircularDependencyDetector.

---
 src/Autofac/Core/Resolving/CircularDependencyDetector.cs | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/Autofac/Core/Resolving/CircularDependencyDetector.cs b/src/Autofac/Core/Resolving/CircularDependencyDetector.cs
index 4d25468c9..71d0c5d10 100644
--- a/src/Autofac/Core/Resolving/CircularDependencyDetector.cs
+++ b/src/Autofac/Core/Resolving/CircularDependencyDetector.cs
@@ -63,8 +63,13 @@ public static void CheckForCircularDependency(IComponentRegistration registratio
                 throw new DependencyResolutionException(string.Format(CultureInfo.CurrentCulture, CircularDependencyDetectorResources.MaxDepthExceeded, registration));
 
             // Checks for circular dependency
-            if (activationStack.Any(a => a.ComponentRegistration == registration))
-                throw new DependencyResolutionException(string.Format(CultureInfo.CurrentCulture, CircularDependencyDetectorResources.CircularDependency, CreateDependencyGraphTo(registration, activationStack)));
+            foreach (var a in activationStack)
+            {
+                if (a.ComponentRegistration == registration)
+                {
+                    throw new DependencyResolutionException(string.Format(CultureInfo.CurrentCulture, CircularDependencyDetectorResources.CircularDependency, CreateDependencyGraphTo(registration, activationStack)));
+                }
+            }
         }
     }
 }