Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!uwm.edu!gem.mps.ohio-state.edu!tut.cis.ohio-state.edu!CCC.NMFECC.GOV!BOWMAN%PPC.MFENET
From: BOWMAN%PPC.MFENET@CCC.NMFECC.GOV
Newsgroups: gnu.emacs.bug
Subject: Emacs Bug
Message-ID: <891016154047.4b000127@CCC.NMFECC.GOV>
Date: 16 Oct 89 22:40:47 GMT
Sender: daemon@tut.cis.ohio-state.edu
Distribution: gnu
Organization: GNUs Not Usenet
Lines: 35


                Emacs Bug Report
Emacs Version: 18.52.4 Compiled Tue Jun 27, 1989 on _RAX (VAX_VMS)
Machine: USC VAX 8600
Operating system: VMS V5.1-B.

Dear Sir:
        I would like to report a rather serious bug (involving an EMACS
crash) I have found and corrected in our VMS implementation of EMACS. To
illustrate the bug, do the following: Execute the function
subprocess-command (usually bound to ESC-$). Then force the subprocess to
send a steady stream of output (e.g. with a $DIRECTORY command or $TYPE a
file). While the subprocess is busy sending output, type a CTRL-G a few
times. The routine sys_abort() will be called from get_display_line(), and
one winds up in the debugger.  (No auto-saves are done nor is the user
prompted by the usual emergency escape queries). At this point it seems
that the windowing and/or screen parameters are messed up. The problem
appears to occur in the routine interrupt_signal() in keyboard.c. The
CTRL-G results in a throw, which is undesirable when the subprocess is
sending output. The problem can be circumvented by putting a call to
clear_waiting_for_input() at the beginning of the subprocess input handler
(in file vmsfns.c).

I hope this is enough information for you to understand and replicate the
bug. The fix I mentioned above has not been installed on the system version of
emacs but unless you have a better solution we will eventually install it.
If you need any more information please contact me.

                        Yours sincerely,

                                    John Bowman
                                    Plasma Physics Lab
                                    P.O. Box 451
                                    Princeton, NJ. 08543
                                    (609)243-2301