diff --git a/AFNetworking/AFURLConnectionOperation.m b/AFNetworking/AFURLConnectionOperation.m
index e371cb3..51507d2 100644
--- a/AFNetworking/AFURLConnectionOperation.m
+++ b/AFNetworking/AFURLConnectionOperation.m
@@ -187,13 +187,13 @@ static BOOL AFSecKeyIsEqualToKey(SecKeyRef key1, SecKeyRef key2) {
 @synthesize lock = _lock;
 
 + (void)networkRequestThreadEntryPoint:(id)__unused object {
-        @autoreleasepool {
-            [[NSThread currentThread] setName:@"AFNetworking"];
+    @autoreleasepool {
+        [[NSThread currentThread] setName:@"AFNetworking"];
 
         NSRunLoop *runLoop = [NSRunLoop currentRunLoop];
         [runLoop addPort:[NSMachPort port] forMode:NSDefaultRunLoopMode];
         [runLoop run];
-        }
+    }
 }
 
 + (NSThread *)networkRequestThread {
@@ -627,15 +627,17 @@ willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challe
                 
                 OSStatus status = SecTrustCreateWithCertificates(certificates, policy, &trust);
                 NSAssert(status == errSecSuccess, @"SecTrustCreateWithCertificates error: %ld", (long int)status);
-                
-                SecTrustResultType result;
-                status = SecTrustEvaluate(trust, &result);
-                NSAssert(status == errSecSuccess, @"SecTrustEvaluate error: %ld", (long int)status);
-                
-                [trustChain addObject:(__bridge_transfer id)SecTrustCopyPublicKey(trust)];
-                
-                CFRelease(trust);
-                CFRelease(certificates);
+                if (status == errSecSuccess && trust) {
+                    SecTrustResultType result;
+                    status = SecTrustEvaluate(trust, &result);
+                    NSAssert(status == errSecSuccess, @"SecTrustEvaluate error: %ld", (long int)status);
+                    if (status == errSecSuccess) {
+                        [trustChain addObject:(__bridge_transfer id)SecTrustCopyPublicKey(trust)];
+                    }
+                }
+              
+                if (trust) CFRelease(trust);
+                if (certificates) CFRelease(certificates);
             }
         }
         
@@ -679,7 +681,7 @@ willSendRequestForAuthenticationChallenge:(NSURLAuthenticationChallenge *)challe
                     OSStatus status = SecTrustEvaluate(serverTrust, &result);
                     NSAssert(status == errSecSuccess, @"SecTrustEvaluate error: %ld", (long int)status);
                     
-                    if (result == kSecTrustResultUnspecified || result == kSecTrustResultProceed) {
+                    if (status == errSecSuccess && (result == kSecTrustResultUnspecified || result == kSecTrustResultProceed)) {
                         NSURLCredential *credential = [NSURLCredential credentialForTrust:serverTrust];
                         [[challenge sender] useCredential:credential forAuthenticationChallenge:challenge];
                     } else {