This was fixed by donaldh++ earlier today: https://github.com/perl6/nqp/commit/081cde249f
With the next nqp bump for Rakudo the warnings will be gone.
[perl #123305] use of '_' as an identifier might not be supported in releases after Java SE 8
Christian Bartolomaeus via RT Fri, 16 Jan 2015 14:40:26 -0800
- [perl #123305] use of '_' as an identifier m... via RT
- [perl #123305] use of '_' as an identif... Christian Bartolomaeus via RT
