System information (version)

• OpenCV => 4.5.4
• Operating System / Platform => ArchLinux
• Compiler => clang 12.0.1

Detailed description

After upgrading opencv from 4.5.3 to 4.5.4, a simple cv::line program cannot work. Drawing a single line on a plain cv::Mat results in an unchanged image.

Steps to reproduce

#include <opencv2/opencv.hpp>

int main() {
    cv::Mat img(200, 200, CV_8UC3, CV_RGB(255, 255, 255));
    cv::arrowedLine(img, cv::Point(0, 0), cv::Point(100, 100), CV_RGB(255, 255, 0), 2, 8, 0);
    cv::imshow("img", img);
    cv::waitKey(0);
    return 0;
}

Compile it with clang 12.0.1 with the following command

clang++ -isystem /usr/include/opencv4 -O3 -DNDEBUG -fPIE -g -std=c++17 -o use_opencv use_opencv.cpp -lopencv_core -lopencv_features2d -lopencv_imgproc -lopencv_highgui

The shown image is plain white.

However, compile the same program with g++ 11.1.0, everything works as expected. A line is drawn on the white background.

g++ -isystem /usr/include/opencv4 -O3 -DNDEBUG -fPIE -g -std=c++17 -o use_opencv use_opencv.cpp -lopencv_core -lopencv_features2d -lopencv_imgproc -lopencv_highgui

Issue submission checklist

• I report the issue, it's not a question
• I checked the problem with documentation, FAQ, open issues,
  forum.opencv.org, Stack Overflow, etc and have not found solution
• I updated to latest OpenCV version and the issue is still there
• There is reproducer code and related data files: videos, images, onnx, etc