Stabilize and align Intersection Observers

- Fixes several crashes
- Aligns the feature with the W3C WD spec

Tag #249

1 files changed, 2 insertions, 1 deletions

diff --git a/dom/base/nsDocument.cpp b/dom/base/nsDocument.cpp
index fd3b52948..8acfd901a 100644
--- a/dom/base/nsDocument.cpp
+++ b/dom/base/nsDocument.cpp
@@ -12507,7 +12507,8 @@ nsDocument::ScheduleIntersectionObserverNotification()
 void
 nsDocument::NotifyIntersectionObservers()
 {
-  for (const auto& observer : mIntersectionObservers) {
+  nsTArray<RefPtr<DOMIntersectionObserver>> observers(mIntersectionObservers);
+  for (const auto& observer : observers) {
     observer->Notify();
   }
 }