bug#6378: all-completions Segfault

[Lennart Borgman]

On Tue, Jun 8, 2010 at 9:08 PM, Juanma Barranquero <lekktu@gmail.com> wrote:
> On Tue, Jun 8, 2010 at 20:58, Lennart Borgman <lennart.borgman@gmail.com> 
> wrote:
>
>> Isn't there a similar case in Ftry_completion?
>
> Apparently no.
>
> ELISP> (try-completion "" [])
> *** Eval error ***  Wrong type argument: vectorp, []
> ELISP> (try-completion "" [[]])
> *** Eval error ***  Bad data in guts of obarray
> ELISP> (try-completion "" [0])
> nil
> ELISP> (try-completion "" [a])
> ""
> ELISP>
>
>    Juanma


So the thing protecting it is that an obarray can't have length 0? Can
one be sure that does not break someday?