in reply to
Re^8: Does IO::Select work? (perfect)
in thread Does IO::Select work? Anywhere?
But at the end of the day, it is bug of those libraries, not bug of IO::Select.
No, it is a serious bug in IO::Select. At the end of a perfect day, it doesn't matter that IO::Select silently does stupid stuff for a case that one shouldn't end up in when in a perfect world. In the real world, there are lots of ways to easily end up in that case and so it is quite simply unacceptable for IO::Select to skip trivial work that would avoid silently doing stupid stuff in that common case.