tux@sm00123:~/Projects/infotool$ ./test2.pl 

'UnknownType' could not be parsed to a type constraint - maybe you need to pre-declare the type with class_type at /home/tux/CPAN/lib/perl5/MooseX/Declare/Syntax/MethodDeclaration.pm line 40
Segmentation fault (Speicherabzug geschrieben)