Update last found time when evaluating an input (AFLplusplus#2782)

Co-authored-by: celian <cglenaz>
Co-authored-by: Dongjia "toka" Zhang <[email protected]>

libafl/src/fuzzer/mod.rs

@@ -298,7 +298,8 @@ where
         + MaybeHasClientPerfMonitor
         + UsesInput<Input = <S::Corpus as Corpus>::Input>
         + HasCurrentTestcase
-        + HasSolutions,
+        + HasSolutions
+        + HasLastFoundTime,
     F: Feedback<EM, <S::Corpus as Corpus>::Input, OT, S>,
     OF: Feedback<EM, <S::Corpus as Corpus>::Input, OT, S>,
     OT: ObserversTuple<<S::Corpus as Corpus>::Input, S> + Serialize,
@@ -359,6 +360,9 @@ where
         if send_events {
             self.serialize_and_dispatch(state, manager, input, &exec_res, observers, exit_kind)?;
         }
+        if exec_res != ExecuteInputResult::None {
+            *state.last_found_time_mut() = current_time();
+        }
         Ok((exec_res, corpus_id))
     }
 
@@ -505,7 +509,8 @@ where
         + MaybeHasClientPerfMonitor
         + HasCurrentTestcase
         + UsesInput<Input = <S::Corpus as Corpus>::Input>
-        + HasExecutions,
+        + HasExecutions
+        + HasLastFoundTime,
     <S::Corpus as Corpus>::Input: Input,
     S::Solutions: Corpus<Input = <S::Corpus as Corpus>::Input>,
 {