diff --git a/fuzzers/wcet_qemu_sys/src/bin/fuzzer.rs b/fuzzers/wcet_qemu_sys/src/bin/fuzzer.rs
index bc046a7c30..1a44424d69 100644
--- a/fuzzers/wcet_qemu_sys/src/bin/fuzzer.rs
+++ b/fuzzers/wcet_qemu_sys/src/bin/fuzzer.rs
@@ -1,5 +1,6 @@
 //! A singlethreaded QEMU fuzzer that can auto-restart.
 
+use libafl::stats::SimpleStats;
 use wcet_qemu_sys::sysstate::feedbacks::HitSysStateFeedback;
 use wcet_qemu_sys::sysstate::MiniFreeRTOSSystemState;
 use libafl::corpus::QueueCorpusScheduler;
@@ -73,7 +74,7 @@ use libafl_qemu::{
     clock::ClockFeedback,
     clock::QemuClockIncreaseFeedback
 };
-use wcet_qemu_sys::worst::{SortedFeedback,HitFeedback,HitImprovingFeedback,LenTimeMaximizerCorpusScheduler};
+use wcet_qemu_sys::worst::{SortedFeedback,HitFeedback,HitImprovingFeedback,TimeStateMaximizerCorpusScheduler};
 
 
 /// The fuzzer main
diff --git a/fuzzers/wcet_qemu_sys/src/bin/showmap.rs b/fuzzers/wcet_qemu_sys/src/bin/showmap.rs
index 772a117104..4180be6eeb 100644
--- a/fuzzers/wcet_qemu_sys/src/bin/showmap.rs
+++ b/fuzzers/wcet_qemu_sys/src/bin/showmap.rs
@@ -337,7 +337,7 @@ fn fuzz(
         ExitKind::Ok
     };
     //======= Set System-State watchpoints
-    let system_state_filter = QemuInstrumentationFilter::AllowList(vec![svh..svh+1,systick_handler..systick_handler+1,svc_handle..svc_handle+1]);
+    let system_state_filter = QemuInstrumentationFilter::AllowList(vec![svh..svh+1]);
 
     //======= Construct the executor, including the Helpers. The edges_observer still contains the ref to EDGES_MAP
     let mut executor = QemuExecutor::new(
diff --git a/fuzzers/wcet_qemu_sys/src/sysstate/observers.rs b/fuzzers/wcet_qemu_sys/src/sysstate/observers.rs
index 30bbd5b7a7..8c5fdb12eb 100644
--- a/fuzzers/wcet_qemu_sys/src/sysstate/observers.rs
+++ b/fuzzers/wcet_qemu_sys/src/sysstate/observers.rs
@@ -113,7 +113,7 @@ fn tcb_list_to_vec_cached(list: List_t, dump: &mut HashMap<u32,rtos_struct>) ->
 fn refine_system_states(input: &mut Vec<FreeRTOSSystemStateRaw>) -> Vec<MiniFreeRTOSSystemState> {
 let mut ret = Vec::<MiniFreeRTOSSystemState>::new();
 let mut start_tick : u64 = 0;
-for i in input.into_iter() {
+for mut i in input.drain(..) {
     let mut collector = Vec::<MiniTCB>::new();
     for j in i.prio_ready_lists.into_iter().rev() {
         let mut tmp = tcb_list_to_vec_cached(j,&mut i.dumping_ground).iter().map(|x| MiniTCB::from_tcb(x)).collect();