From 2bb35bbad6422ba3884d3ab7c21805ad10075804 Mon Sep 17 00:00:00 2001
From: Andrey Sudiev <andrey.su@onyxenterprises.com>
Date: Fri, 15 Jun 2018 16:44:08 +0300
Subject: [PATCH] Fix memory leak by unset cancellers

---
 .../src/Adapter/WebonyxGraphQLSyncPromiseAdapter.php          | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/promise-adapter/src/Adapter/WebonyxGraphQLSyncPromiseAdapter.php b/lib/promise-adapter/src/Adapter/WebonyxGraphQLSyncPromiseAdapter.php
index f118a33..6245a92 100644
--- a/lib/promise-adapter/src/Adapter/WebonyxGraphQLSyncPromiseAdapter.php
+++ b/lib/promise-adapter/src/Adapter/WebonyxGraphQLSyncPromiseAdapter.php
@@ -111,6 +111,7 @@ public function await($promise = null, $unwrap = false)
         if (null === $promise) {
             Deferred::runQueue();
             SyncPromise::runQueue();
+            $this->cancellers = [];
             return null;
         }
         $promiseAdapter = $this->getWebonyxPromiseAdapter();
@@ -133,6 +134,8 @@ public function await($promise = null, $unwrap = false)
             throw $exception;
         }
 
+        $hash = spl_object_hash($promise);
+        unset($this->cancellers[$hash]);
         return $resolvedValue;
     }
 
@@ -146,6 +149,7 @@ public function cancel($promise)
             throw new \InvalidArgumentException(sprintf('The "%s" method must be called with a compatible Promise.', __METHOD__));
         }
         $canceller = $this->cancellers[$hash];
+        unset($this->cancellers[$hash]);
         $adoptedPromise = $promise;
         if ($promise instanceof Promise) {
             $adoptedPromise = $promise->adoptedPromise;