Cleanup for #3035 (#3059)

Author: tokatoka

fuzzers/inprocess/fuzzbench/src/lib.rs

@@ -260,7 +260,7 @@ fn fuzz(
     let mut feedback = feedback_or!(
         // New maximization map feedback linked to the edges observer and the feedback state
         map_feedback,
-        CrashFeedback::new(),
+        // CrashFeedback::new(),
     );
 
     // A feedback to choose if an input is a solution or not
@@ -390,9 +390,9 @@ fn fuzz(
     #[cfg(unix)]
     {
         let null_fd = file_null.as_raw_fd();
-        // dup2(null_fd, io::stdout().as_raw_fd())?;
+        dup2(null_fd, io::stdout().as_raw_fd())?;
         if std::env::var("LIBAFL_FUZZBENCH_DEBUG").is_err() {
-            // dup2(null_fd, io::stderr().as_raw_fd())?;
+            dup2(null_fd, io::stderr().as_raw_fd())?;
         }
     }
     // reopen file to make sure we're at the end

libafl/src/feedbacks/map.rs

@@ -617,7 +617,7 @@ where
 
         let mut interesting = false;
         // TODO Replace with match_name_type when stable
-        let observer = observers.get(&self.map_ref).unwrap().as_ref();
+        let observer = observers.get(&self.map_ref).expect("MapObserver not found. This is likely because you entered the crash handler with the wrong executor/observer").as_ref();
 
         let map_state = state
             .named_metadata_map_mut()