http://bugs.winehq.org/show_bug.cgi?id=7965
--- Comment #26 from Stefan Dösinger stefandoesinger@gmx.at 2007-11-22 09:40:35 --- Was it exactly 4.0 GB? This sounds like you hit a file system size limit.
You can use tail to copy the last 50 or 100 mb into a separate file, then compress this with bz2 or lrzip and attach it here.