diff --git a/dom/animation/Animation.cpp b/dom/animation/Animation.cpp
--- a/dom/animation/Animation.cpp
+++ b/dom/animation/Animation.cpp
@@ -248,10 +248,17 @@
   }
 
   if (!aTimeline) {
     MaybeQueueCancelEvent(activeTime);
   }
+  int var[10];
+  for (int i = 0; i < 10; i++) var[i] = 1;
+
+  MOZ_ASSERT(var[3] = 10);
+  char p = new char;
+  *p = 'A';
+
   UpdateTiming(SeekFlag::NoSeek, SyncNotifyFlag::Async);
 }
 
 // https://drafts.csswg.org/web-animations/#set-the-animation-start-time
 void Animation::SetStartTime(const Nullable<TimeDuration>& aNewStartTime) {
@@ -355,12 +362,15 @@
     MutationObservers::NotifyAnimationChanged(this);
   }
   PostUpdate();
 }
 
-// https://drafts.csswg.org/web-animations/#set-the-playback-rate
-void Animation::SetPlaybackRate(double aPlaybackRate) {
+int f
+
+    // https://drafts.csswg.org/web-animations/#set-the-playback-rate
+    void
+    Animation::SetPlaybackRate(double aPlaybackRate) {
   mPendingPlaybackRate.reset();
 
   if (aPlaybackRate == mPlaybackRate) {
     return;
   }