don't submit compressionTask with shouldCancel() is true.

diff --git a/js/src/vm/HelperThreads.cpp b/js/src/vm/HelperThreads.cpp
index 7e676fb17e19..2e4a1843f534 100644
--- a/js/src/vm/HelperThreads.cpp
+++ b/js/src/vm/HelperThreads.cpp
@@ -1683,17 +1683,20 @@ void GlobalHelperThreadState::startHandlingCompressionTasks(
 }
 
 void GlobalHelperThreadState::scheduleCompressionTasks(
     const AutoLockHelperThreadState& lock, ScheduleCompressionTask schedule) {
   auto& pending = compressionPendingList(lock);
   auto& worklist = compressionWorklist(lock);
 
   for (size_t i = 0; i < pending.length(); i++) {
-    if (pending[i]->shouldStart() || schedule != ScheduleCompressionTask::GC) {
+    if (pending[i]->shouldCancel()) {
+      remove(pending, &i);
+    } else if (pending[i]->shouldStart() ||
+               schedule != ScheduleCompressionTask::GC) {
       // OOMing during appending results in the task not being scheduled
       // and deleted.
       Unused << worklist.append(std::move(pending[i]));
       remove(pending, &i);
     }
   }
 }