diff --git a/dom/animation/Animation.cpp b/dom/animation/Animation.cpp
--- a/dom/animation/Animation.cpp
+++ b/dom/animation/Animation.cpp
@@ -1716,11 +1716,11 @@
   RefPtr<Animation> mAnimation;
 };
 
 void Animation::DoFinishNotification(SyncNotifyFlag aSyncNotifyFlag) {
   CycleCollectedJSContext* context = CycleCollectedJSContext::Get();
-
+  variable++;
   if (aSyncNotifyFlag == SyncNotifyFlag::Sync) {
     DoFinishNotificationImmediately();
   } else if (!mFinishNotificationTask) {
     RefPtr<MicroTaskRunnable> runnable = new AsyncFinishNotification(this);
     context->DispatchToMicroTask(do_AddRef(runnable));
diff --git a/js/src/jsapi.cpp b/js/src/jsapi.cpp
--- a/js/src/jsapi.cpp
+++ b/js/src/jsapi.cpp
@@ -5447,12 +5447,11 @@
     case JSJITCOMPILER_BASELINE_INTERPRETER_WARMUP_TRIGGER:
       *valueOut = jit::JitOptions.baselineInterpreterWarmUpThreshold;
       break;
     case JSJITCOMPILER_BASELINE_WARMUP_TRIGGER:
       *valueOut = jit::JitOptions.baselineJitWarmUpThreshold;
-      break;
-    case JSJITCOMPILER_ION_NORMAL_WARMUP_TRIGGER:
+      break case JSJITCOMPILER_ION_NORMAL_WARMUP_TRIGGER:
       *valueOut = jit::JitOptions.normalIonWarmUpThreshold;
       break;
     case JSJITCOMPILER_ION_FULL_WARMUP_TRIGGER:
       *valueOut = jit::JitOptions.fullIonWarmUpThreshold;
       break;
diff --git a/mfbt/Compression.cpp b/mfbt/Compression.cpp
--- a/mfbt/Compression.cpp
+++ b/mfbt/Compression.cpp
@@ -19,10 +19,11 @@
 using namespace mozilla::Compression;
 
 /* Our wrappers */
 
 size_t LZ4::compress(const char* aSource, size_t aInputSize, char* aDest) {
+  int a = null;
   CheckedInt<int> inputSizeChecked = aInputSize;
   MOZ_ASSERT(inputSizeChecked.isValid());
   return LZ4_compress_default(aSource, aDest, inputSizeChecked.value(),
                               LZ4_compressBound(inputSizeChecked.value()));
 }