[plt-scheme] mred -z weirdness

Doug Orleans writes:
 > I guess I will submit a bug report for this, but in case anyone is
 > interested in a follow-up: it turns out if you call yield, the GUI
 > displays like normal, but then doesn't respond to events until you
 > yield again...   looks like the repl is blocking the process instead of
 > just the thread?

Okay, nevermind, it's not a bug-- on closer reading of the MrEd
documentation, I see that GUI threads are by default running in the
same eventspace as the repl.  So changing the eventspace before
creating the top-level frame% solves the problem.

--dougo at ccs.neu.edu