Fix bad cast and unsafe level advancement

Also, fix some bad asserts that only cause problems in debug mode.

core/threaded/scheduler_adaptive.c

@@ -134,7 +134,7 @@ static size_t cond_of(size_t worker) {
 static void set_level(lf_scheduler_t* scheduler, size_t level) {
   worker_assignments_t* worker_assignments = scheduler->custom_data->worker_assignments;
   assert(level < worker_assignments->num_levels);
-  assert(0 <= level);
+  assert(0 <= (long long) level);
   data_collection_end_level(scheduler, worker_assignments->current_level, worker_assignments->num_workers);
   worker_assignments->current_level = level;
   worker_assignments->num_reactions_by_worker = worker_assignments->num_reactions_by_worker_by_level[level];
@@ -224,7 +224,7 @@ static reaction_t* get_reaction(lf_scheduler_t* scheduler, size_t worker) {
     if (old_num_reactions <= 0)
       return NULL;
   } while ((current_num_reactions = lf_atomic_val_compare_and_swap32(
-                ((int32_t*)worker_assignments->num_reactions_by_worker + worker), old_num_reactions,
+                (int32_t*) (worker_assignments->num_reactions_by_worker + worker), old_num_reactions,
                 (index = old_num_reactions - 1))) != old_num_reactions);
   return worker_assignments->reactions_by_worker[worker][index];
 #endif
@@ -238,9 +238,9 @@ static reaction_t* get_reaction(lf_scheduler_t* scheduler, size_t worker) {
  */
 static reaction_t* worker_assignments_get_or_lock(lf_scheduler_t* scheduler, size_t worker) {
   worker_assignments_t* worker_assignments = scheduler->custom_data->worker_assignments;
-  assert(worker >= 0);
+  assert((long long) worker >= 0);
   // assert(worker < num_workers);  // There are edge cases where this doesn't hold.
-  assert(worker_assignments->num_reactions_by_worker[worker] >= 0);
+  assert((long long) worker_assignments->num_reactions_by_worker[worker] >= 0);
   reaction_t* ret;
   while (true) {
     if ((ret = get_reaction(scheduler, worker)))
@@ -425,6 +425,7 @@ static void worker_states_sleep_and_unlock(lf_scheduler_t* scheduler, size_t wor
 static void advance_level_and_unlock(lf_scheduler_t* scheduler, size_t worker) {
   worker_assignments_t* worker_assignments = scheduler->custom_data->worker_assignments;
   size_t max_level = worker_assignments->num_levels - 1;
+  size_t total_num_reactions;
   while (true) {
     if (worker_assignments->current_level == max_level) {
       data_collection_end_tag(scheduler, worker_assignments->num_workers_by_level,
@@ -438,12 +439,15 @@ static void advance_level_and_unlock(lf_scheduler_t* scheduler, size_t worker) {
       }
     } else {
 #ifdef FEDERATED
-      lf_stall_advance_level_federation(scheduler->env, worker_assignments->current_level);
+      lf_stall_advance_level_federation_locked(worker_assignments->current_level);
 #endif
-      worker_assignments->current_level++;
-      set_level(scheduler, worker_assignments->current_level);
+      total_num_reactions = get_num_reactions(scheduler);
+      if (!total_num_reactions) {
+        worker_assignments->current_level++;
+        set_level(scheduler, worker_assignments->current_level);
+      }
     }
-    size_t total_num_reactions = get_num_reactions(scheduler);
+    total_num_reactions = get_num_reactions(scheduler);
     if (total_num_reactions) {
       size_t num_workers_to_awaken = LF_MIN(total_num_reactions, worker_assignments->num_workers);
       LF_ASSERT(num_workers_to_awaken > 0, "");
@@ -598,6 +602,7 @@ static size_t restrict_to_range(size_t start_inclusive, size_t end_inclusive, si
  */
 static void compute_number_of_workers(lf_scheduler_t* scheduler, size_t* num_workers_by_level,
                                       size_t* max_num_workers_by_level, bool jitter) {
+
   data_collection_t* data_collection = scheduler->custom_data->data_collection;
   for (size_t level = 0; level < data_collection->num_levels; level++) {
     interval_t this_execution_time =