[perl #62700] .parse hangs on empty grammar

[jn...@jnthn.net via RT]

On Sat Jan 24 08:38:49 2009, masak wrote:
> It's r35957, and Rakudo seems to hang on the following:
> 
> $ perl6 -e 'grammar G {}; G.parse("")'
> 
> Putting in a 'regex TOP { something }' seems to work... but it's a bit
> unintuitive that nothing happens without it, not even an error
> message.

Fixed in git 8b8095c; this now dies with:

The grammar has no TOP rule to invoke.

Thanks,

Jonathan