🚀 go-pugleaf

I am reporting a bug with emacs version 18.56, which I have compiled (with cc)
under Ultrix 2.0 running on a VaxStation II.  I have been using the previous
version 18.55 extensively with no problem.

The problem is that M-x shell does not work: after loading shell.el, the screen
freezes, and all further keyboard input is ignored.  I tried debugging it with
gdb in one window, and emacs popping up another X window, so that it wouldn't
take over the tty gdb was running under, but not only did the emacs X window
die, but so did the gdb window.  The command ps shows a defunct process
(presumably the csh process) spawned by emacs.  Sending interrupts to the emacs
process or the gdb process has very little effect.  Sending violent interrupts
like SEGV and BUS to the emacs process causes it to go away about 5 minutes
later.  It can't be dumping core, because I have coredumpsize limited to 0.

I know that some recent changes to the SUN operating system with respect to the
TIOCSPGRP ioctl may have forced some changes in this area -- perhaps fixing the
sun version has broken some other versions.

		Dan Grayson

    internet:	dan@math.uiuc.edu
     us mail:	Dan Grayson, Math Dept, Univ of Ill, 1409 W. Green St.,
		Urbana 61801, USA
       phone:	217-367-6384 home, 217-333-6209 office