--- a/dom/canvas/ImageBitmap.cpp
+++ b/dom/canvas/ImageBitmap.cpp
@@ -1536,17 +1536,22 @@ nsresult CreateImageBitmapFromBlob::GetM
   }
 
   return asyncInputStream->AsyncWait(this, 0, 128, mMainThreadEventTarget);
 }
 
 NS_IMETHODIMP
 CreateImageBitmapFromBlob::OnInputStreamReady(nsIAsyncInputStream* aStream) {
   // The stream should have data now. Let's start from scratch again.
-  return MimeTypeAndDecodeAndCropBlob();
+  nsresult rv = MimeTypeAndDecodeAndCropBlob();
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    MimeTypeAndDecodeAndCropBlobCompletedMainThread(nullptr, rv);
+  }
+
+  return NS_OK;
 }
 
 NS_IMETHODIMP
 CreateImageBitmapFromBlob::OnImageReady(imgIContainer* aImgContainer,
                                         nsresult aStatus) {
   MOZ_ASSERT(NS_IsMainThread());
 
   if (NS_FAILED(aStatus)) {