No matter what I do:
- start MIT Scheme with the --edit option
- invoke (edit) / (edwin) / (create-editor) in the REPL

Edwin doesn't start.

`mit-scheme --edit' produces the exact same outcome as plane
`mit-scheme' (i.e. starts a REPL)

Invoking any of the procedures gives this error:
1 ]=> (create-editor)   ; substitute (edit) or (edwin) here

;The primitive xterm-open-window signalled an anonymous error.
;To continue, call RESTART with an option number:
; (RESTART 1) => Return to read-eval-print level 1.

2 error>

What gives?

Tested in xterm, urxvt and tmux inside urxvt.
I use Xmonad as the window manager (and haven't had any problems popping
up windows with other apps, in case that's what starting Edwin is
supposed to do; I never used MIT Scheme before).

The problem was caused by Edwin choking at the Xft font customisation
for Emacs in my .Xdefaults. Adding `edwin*font: fixed' fixed it for me.

As far as I am concerned this bug could be closed (in any case it's not
Debian-specific and the upstream knows about it already), although it
would be nice to have a better error message -- without Taylor R.
Campbell's hand-holding, I would hardly realise the actual problem.

  Štěpán

I think this bug should be classified "wishlist", as it is mainly a
request for a better error message and better documentation.