Hello Antonio, could you please add to which windows version you were trying to connect.
Maybe you could also try to start it that way:
catchsegv rdesktop ...
Even better would be if you could install debug symbols like
described in [1] and systemd-coredump.
Then after an application crashed you should receive a
backtrace at the end of this command:
journalctl --no-pager
[1] https://wiki.debian.org/HowToGetABacktrace#Installing_the_debugging_symbols
Kind regards,
Bernhard

