Dear Maintainer,

Icedove has been extremely unstable for me since the 1.45.5 update.
There seem to be a number of situations which cause crashes, some of
which I think others have reported. I haven't seen a report for this
particular crash though. In this case I attempted to resize the mail
window and the program crashed. I was running in safe mode and with
the debugger active, so I was able to obtain a gdb trace, which I've
included below.