You right Mattias, Cyrax's patch (comphook.pas.patch) fix on my system. Kubuntu 14.04 x64 fpc svn r29192 On 02-12-2014 14:13, Mattias Gaertner wrote: > Maybe it is this compiler bug: > > http://bugs.freepascal.org/view.php?id=27071 > > > Mattias