System information (version)

• OpenCV => 4.5.4
• Operating System / Platform => Linux
• Compiler => clang 12

Detailed description

cv::rectangle with a cv::Rect where x and width are std::numeric_limits::max() creates a problem because it calls Rect::br() which overflows (x+width does not fit in an int and overflows).
The external call to cv::rectangle is still valid, the internal call to cv::Rect::br() not. What should be the proper solution ?

• not allow the creation of a cv::Rect with such big values because br() (and area() ) will overflow ?
• only warn of overflows when calling br() ?
• have br() return std::numeric_limits::max() ? (probably not desirable because inaccurate, then again what is returned now is wrong)
• create a safe_br() function that caps and not overflows ?
• only fix cv::rectangle for now. Then again, other functions will probably fail.

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