bug#1243: marked as done (Verilog mode hanging emacs 22.2)

[owner@emacsbugs.donarmstrong.com (Emacs bug Tracking System)]

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Your message dated Thu, 12 Feb 2009 23:09:17 -0500
with message-id <wwbpt79dw2.fsf@fencepost.gnu.org>
and subject line Re: bug#1243: Verilog mode hanging emacs 22.2
has caused the Emacs bug report #1243,
regarding Verilog mode hanging emacs 22.2
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
bug report if necessary, and/or fix the problem forthwith.

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-- 
1243: http://emacsbugs.donarmstrong.com/cgi-bin/bugreport.cgi?bug=1243
Emacs Bug Tracking System
Contact owner@emacsbugs.donarmstrong.com with problems

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Hi,

We recently switched from emacs 21.3 to 22.2, and have started seeing
this hang.  I've tried updating verilog-mode.el, but it behaves the same
way.  Emacs 21.3 does not exhibit this.

The symptoms:

Bring a verilog file (*.v) into the editor, and either search for
something or simply page down thru it.  After a few searches or pages,
the clock symbol is displayed on the mouse cursor, and emacs is
completely unresponsive.  A "top" shows that emacs is using most of the
cpu.  Nothing I've tried from within emacs has been able to break out of
this - the emacs process is hung.  This seems to happen more with
font-lock mode enabled, but it also occurs w/o it.

I've contacted the maintainer of verilog-mode, and he has been able to
reproduce this, but is unsure how to debug it.  His stack trace:

(gdb) where
#0  0x08171d01 in Fbyte_code (bytestr=136448595, vector=136448620, 
maxdepth=56) at bytecode.c:508
#1  0x081485e4 in Feval (form=136448581) at eval.c:2334
#2  0x0814a709 in internal_lisp_condition_case (var=137418953, 
bodyform=136448581, handlers=136448805) at eval.c:1426
#3  0x081722e3 in Fbyte_code (bytestr=136448515, vector=136448532, 
maxdepth=32) at bytecode.c:869
#4  0x081489d5 in funcall_lambda (fun=Variable "fun" is not available.
) at eval.c:3184
#5  0x08148e4b in Ffuncall (nargs=1, args=0xbface160) at eval.c:3043
#6  0x081730b9 in Fbyte_code (bytestr=156662779, vector=156663996, 
maxdepth=16) at bytecode.c:679
#7  0x081489d5 in funcall_lambda (fun=Variable "fun" is not available.
) at eval.c:3184
#8  0x08148e4b in Ffuncall (nargs=1, args=0xbface260) at eval.c:3043
#9  0x081730b9 in Fbyte_code (bytestr=156624227, vector=156689996, 
maxdepth=32) at bytecode.c:679
#10 0x081489d5 in funcall_lambda (fun=Variable "fun" is not available.
) at eval.c:3184
#11 0x08148e4b in Ffuncall (nargs=1, args=0xbface360) at eval.c:3043
#12 0x081730b9 in Fbyte_code (bytestr=136448595, vector=136448620, 
maxdepth=56) at bytecode.c:679
#13 0x081485e4 in Feval (form=136448581) at eval.c:2334
#14 0x0814a709 in internal_lisp_condition_case (var=137418953, 
bodyform=136448581, handlers=136448805) at eval.c:1426
#15 0x081722e3 in Fbyte_code (bytestr=136448515, vector=136448532, 
maxdepth=32) at bytecode.c:869
#16 0x081489d5 in funcall_lambda (fun=Variable "fun" is not available.
) at eval.c:3184
#17 0x08148e4b in Ffuncall (nargs=1, args=0xbface660) at eval.c:3043
#18 0x081730b9 in Fbyte_code (bytestr=156662779, vector=156663996, 
maxdepth=16) at bytecode.c:679
#19 0x081489d5 in funcall_lambda (fun=Variable "fun" is not available.
) at eval.c:3184
#20 0x08148e4b in Ffuncall (nargs=1, args=0xbface760) at eval.c:3043
#21 0x081730b9 in Fbyte_code (bytestr=156624227, vector=156689996, 
maxdepth=32) at bytecode.c:679
#22 0x081489d5 in funcall_lambda (fun=Variable "fun" is not available.
) at eval.c:3184
#23 0x08148e4b in Ffuncall (nargs=1, args=0xbface860) at eval.c:3043
#24 0x081730b9 in Fbyte_code (bytestr=136448595, vector=136448620, 
maxdepth=56) at bytecode.c:679
#25 0x081485e4 in Feval (form=136448581) at eval.c:2334
#26 0x0814a709 in internal_lisp_condition_case (var=137418953, 
bodyform=136448581, handlers=136448805) at eval.c:1426
#27 0x081722e3 in Fbyte_code (bytestr=136448515, vector=136448532, 
maxdepth=32) at bytecode.c:869
#28 0x081489d5 in funcall_lambda (fun=Variable "fun" is not available.
) at eval.c:3184


The details of my system configuration:

In GNU Emacs 22.2.1 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2008-04-17 on madccat02
Windowing system distributor `Hummingbird Ltd.', version 11.0.10000
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: C
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Major mode: Text

Minor modes in effect:
  shell-dirtrack-mode: t
  display-time-mode: t
  show-paren-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t


Any suggestions for how to proceed with this?  We'd like to stay
reasonably up-to-date with emacs releases, but as we edit verilog all
the time, this is a bit of a showstopper for us.

Thanks,
Paul Mitchell
HW Design Engineer
AMD, Inc.
(508) 303-3932

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From: Glenn Morris <rgm@gnu.org>
To: 1243-done@emacsbugs.donarmstrong.com
Subject: Re: bug#1243: Verilog mode hanging emacs 22.2
Date: Thu, 12 Feb 2009 23:09:17 -0500
Message-ID: <wwbpt79dw2.fsf@fencepost.gnu.org>


2009-02-12  Stefan Monnier  <monnier@iro.umontreal.ca>

    * progmodes/verilog-mode.el (verilog-mode): Avoid circular use of
    syntax-ppss.