kaitai-struct-compiler turns off character echo
This was pretty hard for me to grasp, but it's recreatable.

Running Cygwin on Windows 10, `kaitai-struct-compiler` straight-up turns off terminal echo and it has to be turned back on with `stty sane`. I created a `Makefile` to do this for me because it has been driving me _*mad*_.

And I'm very sorry that I'm running KSC on Cygwin. So very sorry.