I read the specific examples that the maintainers of each project gave. The ones the ffmpeg maintainers complained about appeared to be real bugs. In fact i dont think the ffmpeg maintainers even dispute that. The ffmpeg maintainers after all fixed the issue in question. The ones the curl maintainers gave were clearly nonsense. The curl maintainers did not fix the issue because there was nothing to fix because the report didn't actually report anything that could be fixed because it made no sense.
So you looked their the bug list and then the source code and found which issues were legitimate or someone did so on your behalf?