This'll be 99% useless but:

I saw the same (well, similar) thing a week or so ago when I just started
using org mode. But I then fixed it and can't reproduce it at all. Sigh.

It had *something* to do with the first piece of text in my org-mode buffer
not being a heading (i.e. not starting with one or more * characters). When
I then tried to bring up an agenda view, emacs hung.

As I say, it was *something* like that - but not exactly (I just tried it,
and I can't reproduce the problem).

c.

On 4/18/07, Simon Winwood <sjw@cse.unsw.edu.au> wrote:
>
>
>        When using org-mode, occasionally (semi-unrepeatable :( emacs
> locks up completely: 100% CPU, doesn't respond to C-g, does respond to
> X-redisplay requests --- a kill is required.
>
>         Unfortunately, the bug isn't readily reproducible, although it
> happens reasonably frequently.  It sounds more like an emacs bug, but
> it seems to occur only in org mode.
>
>         Any ideas?  It might be a font-lock bug, but without being
> able to reproduce the bug, I can't really tell.
>
>      Thanks,
>
>         Simon
>
> Versions:
> Linux Ubuntu (Edgy)
> Emacs 22.0.50-1 (emacs-snapshot-gtk in Ubuntu)
> Org   4.44
>
> A GDB attach and backtrace gives (although I don't know how much I
> trust it):
>
> 0x08197806 in matherr ()
> (gdb) bt
> #0  0x08197806 in matherr ()
> #1  0x08197930 in matherr ()
> #2  0x08198864 in matherr ()
> #3  0x08198b9e in matherr ()
> #4  0x08135c6c in abort ()
> #5  0x0815a705 in re_compile_pattern ()
> #6  0x0818523d in matherr ()
> #7  0x0815a11a in re_compile_pattern ()
> #8  0x0815a542 in re_compile_pattern ()
> #9  0x0818523d in matherr ()
> #10 0x0815a11a in re_compile_pattern ()
> #11 0x0815a542 in re_compile_pattern ()
> #12 0x0818523d in matherr ()
> #13 0x0815a11a in re_compile_pattern ()
> #14 0x0815a542 in re_compile_pattern ()
> #15 0x0818523d in matherr ()
> #16 0x0815a11a in re_compile_pattern ()
> #17 0x0815a542 in re_compile_pattern ()
> #18 0x0815bbb1 in error ()
> #19 0x0815bd3f in error ()
> #20 0x0815a87a in re_compile_pattern ()
> #21 0x0815ba39 in error ()
> #22 0x080f7625 in abort ()
> #23 0x08159142 in re_compile_pattern ()
> #24 0x080fce17 in abort ()
> #25 0x08103350 in abort ()
> #26 0x08159142 in re_compile_pattern ()
> #27 0x080fcec3 in abort ()
> #28 0x081591fa in re_compile_pattern ()
> #29 0x080fd93c in abort ()
> #30 0x080fdcfa in abort ()
> #31 0x080fdde7 in abort ()
> #32 0x080f3c65 in abort ()
> #33 0xb75888cc in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
>
>
>
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