From a80267e9e88b3dcebf7f8f1f6f10931a99ddf2ca Mon Sep 17 00:00:00 2001
From: janekptacijarabaci <janekptacijarabaci@seznam.cz>
Date: Thu, 5 Jul 2018 13:04:44 +0200
Subject: Bug 604026 - Sync event loops in workers should be created only if
 compatible with the worker shutdown status

---
 dom/canvas/ImageBitmap.cpp | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

(limited to 'dom/canvas')

diff --git a/dom/canvas/ImageBitmap.cpp b/dom/canvas/ImageBitmap.cpp
index 6588e0aa3..e45cdfc6f 100644
--- a/dom/canvas/ImageBitmap.cpp
+++ b/dom/canvas/ImageBitmap.cpp
@@ -950,7 +950,7 @@ ImageBitmap::CreateInternal(nsIGlobalObject* aGlobal, ImageData& aImageData,
                                                        imageSize,
                                                        aCropRect,
                                                        getter_AddRefs(data));
-    task->Dispatch(aRv);
+    task->Dispatch(Terminating, aRv);
   }
 
   if (NS_WARN_IF(!data)) {
@@ -1377,10 +1377,10 @@ private:
     RefPtr<DecodeBlobInMainThreadSyncTask> task =
       new DecodeBlobInMainThreadSyncTask(mWorkerPrivate, *mBlob, mCropRect,
                                          getter_AddRefs(data), sourceSize);
-    task->Dispatch(rv); // This is a synchronous call.
+    task->Dispatch(Terminating, rv); // This is a synchronous call.
 
+    // In case the worker is terminating, this rejection can be handled.
     if (NS_WARN_IF(rv.Failed())) {
-      // XXXbz does this really make sense if we're shutting down?  Ah, well.
       mPromise->MaybeReject(rv);
       return nullptr;
     }
@@ -2104,7 +2104,10 @@ ImageBitmap::Create(nsIGlobalObject* aGlobal,
                                                                  aFormat,
                                                                  aLayout,
                                                                  getter_AddRefs(data));
-    task->Dispatch(aRv);
+    task->Dispatch(Terminating, aRv);
+    if (aRv.Failed()) {
+      return promise.forget();
+    }
   }
 
   if (NS_WARN_IF(!data)) {
-- 
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