diff --git a/dom/canvas/ImageBitmap.cpp b/dom/canvas/ImageBitmap.cpp
index bb47618a6..62de20763 100644
--- a/dom/canvas/ImageBitmap.cpp
+++ b/dom/canvas/ImageBitmap.cpp
@@ -930,7 +930,7 @@ ImageBitmap::CreateInternal(nsIGlobalObject* aGlobal, ImageData& aImageData,
                             const Maybe<IntRect>& aCropRect, ErrorResult& aRv)
 {
   // Copy data into SourceSurface.
-  dom::Uint8ClampedArray array;
+  RootedTypedArray<Uint8ClampedArray> array(RootingCx());
   DebugOnly<bool> inited = array.Init(aImageData.GetDataObject());
   MOZ_ASSERT(inited);
 
diff --git a/dom/workers/WorkerPrivate.cpp b/dom/workers/WorkerPrivate.cpp
index 860bf8468..1f8b3b70c 100644
--- a/dom/workers/WorkerPrivate.cpp
+++ b/dom/workers/WorkerPrivate.cpp
@@ -6392,7 +6392,7 @@ WorkerPrivate::GarbageCollectInternal(JSContext* aCx, bool aShrinking,
   if (aShrinking || aCollectChildren) {
     JS::PrepareForFullGC(aCx);
 
-    if (aShrinking) {
+    if (aShrinking && mSyncLoopStack.IsEmpty()) {
       JS::GCForReason(aCx, GC_SHRINK, JS::gcreason::DOM_WORKER);
 
       if (!aCollectChildren) {