Need help in debugging GNU-sync-vc crash with 21.4.19

[Ville Skyttä]

On Mon, 2006-04-24 at 23:54 +0900, Stephen J. Turnbull wrote:

>     -vanilla                                                     \
>     -eval "(progn (setq debug-on-signal t) (require 'vc-hooks))" \
>     /tmp/foo/foo.txt
> 
> This consistently gives me a "byte code underflow" error, in a
> reasonable place (in the probe with `vc-svn-registered').  Please let
> me know if you get that, too.

I don't get that, but I get a consistent crash.  gdb and lisp backtraces
attached.

This is from the Fedora Extras packaged build.  Let me know if you'd
like me to produce the backtraces with vanilla 21.4, IIRC I could
trigger the crash just as easily with it as well.
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