From 18a25d3b3dd630943f88f62a0e590008545b8738 Mon Sep 17 00:00:00 2001
From: lazymio <mio@lazym.io>
Date: Fri, 14 Jun 2024 19:29:38 +0800
Subject: [PATCH] Fix debug assert on map_state.num_covered_map_indexes (#2310)

---
 libafl/src/feedbacks/map.rs | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/libafl/src/feedbacks/map.rs b/libafl/src/feedbacks/map.rs
index 127c0245a9..97f36cf2fe 100644
--- a/libafl/src/feedbacks/map.rs
+++ b/libafl/src/feedbacks/map.rs
@@ -495,10 +495,11 @@ where
                 .enumerate()
                 .filter(|(_, value)| *value != initial)
             {
-                if history_map[i] == initial {
+                let val = R::reduce(history_map[i], value);
+                if history_map[i] == initial && val != initial {
                     map_state.num_covered_map_indexes += 1;
                 }
-                history_map[i] = R::reduce(history_map[i], value);
+                history_map[i] = val;
                 indices.push(i);
             }
             let meta = MapIndexesMetadata::new(indices);
@@ -510,10 +511,11 @@ where
                 .enumerate()
                 .filter(|(_, value)| *value != initial)
             {
-                if history_map[i] == initial {
+                let val = R::reduce(history_map[i], value);
+                if history_map[i] == initial && val != initial {
                     map_state.num_covered_map_indexes += 1;
                 }
-                history_map[i] = R::reduce(history_map[i], value);
+                history_map[i] = val;
             }
         }