as.exe does null pointer reference

[Andy]

Andreas Schwab wrote:
> Andy <address@hidden> writes:
>
>   
> > I get that my email is over 200k, it is under 4k even with mail headers.
> >     
>
> That appears to have been a transient hiccup on mail.gnu.org, it also
> affected other gnu.org lists.
>
> Andreas.
>
>   
In the mean time I narrowed down the nature of the bug,
   if a branch instruction's label has a local numerical label that is 
missing the 'f' or 'b' then as.exe references a null pointer.

Proper behavior would be to report a defective label, or an undefined label.
The as.exe version is 2.17.50 (from codesourcery's arm branch), although 
a few before that acted the same.