nr,gnb,sched: avoid logging warning for pending feedback of UEs that were just removed

srsenb/src/stack/mac/nr/sched_nr.cc

@@ -101,7 +101,14 @@ void sched_nr::ue_cfg(uint16_t rnti, const ue_cfg_t& uecfg)
 
 void sched_nr::ue_rem(uint16_t rnti)
 {
-  sched_workers->enqueue_event(rnti, [this, rnti]() { ue_db.erase(rnti); });
+  sched_workers->enqueue_event(rnti, [this, rnti]() {
+    auto ue_it = ue_db.find(rnti);
+    if (ue_it == ue_db.end()) {
+      logger->warning("SCHED: ue_rem(rnti) called for inexistent rnti=0x%x", rnti);
+      return;
+    }
+    ue_db.erase(rnti);
+  });
 }
 
 bool sched_nr::ue_exists(uint16_t rnti)

srsenb/src/stack/mac/nr/sched_nr_worker.cc

@@ -57,7 +57,7 @@ void slot_cc_worker::run_feedback(ue_map_t& ue_db)
     if (ue_db.contains(f.rnti) and ue_db[f.rnti]->carriers[cfg.cc] != nullptr) {
       f.fdbk(*ue_db[f.rnti]->carriers[cfg.cc]);
     } else {
-      logger.warning("SCHED: feedback received for invalid rnti=0x%x, cc=%d", f.rnti, cfg.cc);
+      logger.info("SCHED: feedback received for rnti=0x%x, cc=%d that has been removed.", f.rnti, cfg.cc);
     }
   }
   tmp_feedback_to_run.clear();