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bug#10664: 24.0.93; JIT font-lock infloops in a C file
From: |
Eli Zaretskii |
Subject: |
bug#10664: 24.0.93; JIT font-lock infloops in a C file |
Date: |
Tue, 07 Feb 2012 19:30:17 +0200 |
> Date: Mon, 06 Feb 2012 19:04:17 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 10664@debbugs.gnu.org
>
> > Date: Mon, 6 Feb 2012 11:09:57 +0000
> > Cc: 10664@debbugs.gnu.org
> > From: Alan Mackenzie <acm@muc.de>
> >
> > I got something similar for this socket.c. I load it into emacs -Q, then
> > start scrolling downwards, a page at a time. The first five scrolls are
> > fine. Then it hangs on the sixth.
> >
> > However, typing C-g (maybe twice) frees it up, and it does the scroll.
> > Careful perusal reveals that the fontification is incomplete. From now
> > on, most key sequences must be followed by C-g to perform their commands.
> > ;-(.
> >
> > Did you actually try C-g when your session hung?
>
> I'm quite sure I did. But that was on Windows, where C-g is less
> powerful than on Posix platforms (since keyboard input is not
> interrupt driven). So it could be that what you can interrupt on
> GNU/Linux, I cannot on Windows.
I'm now absolutely sure this is the case: the offending code runs with
inhibit-quit set, and that prevents Emacs on Windows from interrupting
that code. I know because attaching GDB and using the debugger to set
inhibit-quit to nil breaks the vicious circle and let me salvage my
session without killing Emacs.
Btw, this time the problem happened with main.c from the recent Gawk
4.0.0h pre-release.
- bug#10664: 24.0.93; JIT font-lock infloops in a C file, Eli Zaretskii, 2012/02/05
- bug#10664: 24.0.93; JIT font-lock infloops in a C file, Alan Mackenzie, 2012/02/06
- bug#10664: 24.0.93; JIT font-lock infloops in a C file, Stefan Monnier, 2012/02/06
- bug#10664: 24.0.93; JIT font-lock infloops in a C file, Eli Zaretskii, 2012/02/06
- bug#10664: 24.0.93; JIT font-lock infloops in a C file,
Eli Zaretskii <=
- bug#10664: 24.0.93; JIT font-lock infloops in a C file, Alan Mackenzie, 2012/02/07
- bug#10664: 24.0.93; JIT font-lock infloops in a C file, Eli Zaretskii, 2012/02/07
- bug#10664: 24.0.93; JIT font-lock infloops in a C file, Alan Mackenzie, 2012/02/07
- bug#10664: 24.0.93; JIT font-lock infloops in a C file, Stefan Monnier, 2012/02/07
- bug#10664: 24.0.93; JIT font-lock infloops in a C file, Alan Mackenzie, 2012/02/08
- bug#10664: 24.0.93; JIT font-lock infloops in a C file, Eli Zaretskii, 2012/02/08
- bug#10664: 24.0.93; JIT font-lock infloops in a C file, Stefan Monnier, 2012/02/08
- bug#10664: 24.0.93; JIT font-lock infloops in a C file, Alan Mackenzie, 2012/02/10
- bug#10664: 24.0.93; JIT font-lock infloops in a C file, Eli Zaretskii, 2012/02/12
- bug#10664: 24.0.93; JIT font-lock infloops in a C file, Chong Yidong, 2012/02/14