From 14e0d4355011a3f89d9fd057ccd756bac95c27d8 Mon Sep 17 00:00:00 2001
From: Vincent Rabaud <vrabaud@google.com>
Date: Tue, 2 Jan 2024 22:18:35 +0100
Subject: [PATCH] Fix aruco detector thread safety.

Concurrently writing to a vector<bool> is not thread-safe.
---
 modules/objdetect/src/aruco/aruco_detector.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/objdetect/src/aruco/aruco_detector.cpp b/modules/objdetect/src/aruco/aruco_detector.cpp
index 97a40746a8..031d4849b3 100644
--- a/modules/objdetect/src/aruco/aruco_detector.cpp
+++ b/modules/objdetect/src/aruco/aruco_detector.cpp
@@ -780,7 +780,7 @@ struct ArucoDetector::ArucoDetectorImpl {
         vector<int> idsTmp(ncandidates, -1);
         vector<int> rotated(ncandidates, 0);
         vector<uint8_t> validCandidates(ncandidates, 0);
-        vector<bool> was(ncandidates, false);
+        vector<uint8_t> was(ncandidates, false);
         bool checkCloseContours = true;
 
         int maxDepth = 0;