Re: compilation dies loading vc-arch.el if the source is actually in arch

[Miles Bader <miles@gnu.org>]

Chong Yidong <cyd@stupidchicken.com> writes:
>> The source directories below are of course in an arch working directory
>> (/home/m/miles/src/emacs/devo).  I imagine most people don't have
>> problems because they're not using arch...
>
> What do you mean by "arch working directory"?  I just pulled a copy of
> Emacs from the sv.gnu.org arch repository, and make bootstrap
> completes fine.

That the Emacs source directory is checked-out from arch -- e.g., it has
an {arch} subdirectory.  I could be totally wrong about the necessary
preconditions, of course. :-)

It also happens that I build in a separate build-directory, which might
affect things (my build dir = /home/m/miles/build/emacs/devo, source dir
= /srv/data/home/m/miles/src/emacs/devo).

Hmmm, also I wonder if the presence of things like {arch}/,,inode-sigs
affects things -- I notice that vc-arch.el tends to load files from
there when you visit a file checked out from arch.

   $ ls {arch}/,,inode-sigs
   emacs@sv.gnu.org%emacs--devo--0--patch-669
   emacs@sv.gnu.org%emacs--devo--0--patch-674
   emacs@sv.gnu.org%emacs--devo--0--patch-685
   emacs@sv.gnu.org%emacs--devo--0--patch-695
   emacs@sv.gnu.org%emacs--devo--0--patch-697

Any ideas on how to debug it?  I can reproduce the error in an
interactive emacs, by doing:

   $ cd /home/m/miles/build/emacs/devo/lisp
   $ wins='/home/m/miles/src/emacs/devo/lisp/. /home/m/miles/src/emacs/devo/lisp/./calc /home/m/miles/src/emacs/devo/lisp/./calendar /home/m/miles/src/emacs/devo/lisp/./emacs-lisp /home/m/miles/src/emacs/devo/lisp/./emulation /home/m/miles/src/emacs/devo/lisp/./erc /home/m/miles/src/emacs/devo/lisp/./eshell /home/m/miles/src/emacs/devo/lisp/./gnus /home/m/miles/src/emacs/devo/lisp/./international /home/m/miles/src/emacs/devo/lisp/./language /home/m/miles/src/emacs/devo/lisp/./mail /home/m/miles/src/emacs/devo/lisp/./mh-e /home/m/miles/src/emacs/devo/lisp/./net /home/m/miles/src/emacs/devo/lisp/./play /home/m/miles/src/emacs/devo/lisp/./progmodes /home/m/miles/src/emacs/devo/lisp/./textmodes /home/m/miles/src/emacs/devo/lisp/./url'
   $ ../src/bootstrap-emacs  --no-site-file --multibyte -l autoload --eval '(setq generated-autoload-file "/home/m/miles/src/emacs/devo/lisp/loaddefs.el")' -f batch-update-autoloads $wins

But I'm not sure how to get a lisp stack backtrace -- I tried adding the
command-line option --eval '(setq debug-on-error t) but it seems to have
no effect.  If I subsequently try to manually invoke the same command
inside the resulting emacs session (which is still running) it succeeds!

Thanks,

-Miles

-- 
Love is a snowmobile racing across the tundra.  Suddenly it flips over,
pinning you underneath.  At night the ice weasels come.  --Nietzsche