[no subject]

[Charles Rich <RICH at MIT-AI>]

In ZMAIL in System 79.16, ZMail 40.7, Remote-File 2.0, LMFILE-Remote 5.2,
Programmer's Apprentice 21.4, microcode 849, on Lisp Machine Twenty-two:


Using the Mail option inside ZMAIL, the system gets in a wedged
situation as follows:

I type End to send the message and get an error break because the host
(e.g. AI) is down.  I C-Z out of the error handler, get back to the Mail
buffer and Abort out of it (planning to Continue later).  When I return
to the toplevel of Zmail and try to do anything with the keyboard or use
the mouse to Continue the Who-line says "LOCK".  If I M-C-Abort out of
this state, I get the error handler again telling me I am trying to
unlock a process that I didn't lock.  I use Peek to look at the
situation and it seems it is the Zmail-Background-process which is
locked.  It looks to me like there is perhaps a missing unwind-protect
somewhere to clear a lock.  This state is very hard to get out of.
All I can do is warm-boot, which still leaves Zmail sort of confused.

				-Chuck.