[ale42]

I was expecting Free Pascal not to have the bug, as Pascal generally fails with a visible runtime error, as it does I/O checking by default. However, it seems not to do it when WriteLn goes to the standard output... (even if it is then piped to /dev/full). So the basic

    begin
    WriteLn('Hello World!');
    end.

definitely has the bug, at least with the fpc implementation. On the other hand, explicitly trying to write to /dev/full from the Pascal source triggers a beautiful message:

    Runtime error 101 at $0000000000401104