I tried to reproduce it myself, but I wasn't able to trigger the crash. I tried connecting a second client to the RDP session forcing remmina disconnection, and also to remove network cable from the RDP server, Remmina didn't crash.
Could you please try again with xfreerdp application shipped in freerdp package to see whether this happens with xfreerdp too? -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org