System information (version)

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

Detailed description

There are 243 instances of assert in the code (not in tests nor 3rd_party) while CV_Assert should probably be used:

find ./modules -name 'test' -prune -o -type f -print | xargs grep " assert\( \)*(" | wc -l

Should indeed CV_Assert be used ? Or is there a reason for using assert (performance maybe).

This triggers invalid bugs in fuzzers that expect normal errors to be handled though a proper CV_Assert.

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