I wrote:
I have uploaded a new beta version of GPC to http://www.g-n-u.de/gpc/!
PS: Another important change is that the file and I/O handling in the RTS is now written in Pascal, while formerly a large part of it was written in C. This change has improved several things, but of course, it's possible that errors crept in during the rewrite. So if you experience any new I/O related bugs in this release, please report.
Frank