[perl #122514] [BUG] LTA internal error message when declaring anonymous enum with '::' in Rakudo

[Christian Bartolomaeus via RT]

This works now:

$ perl6 -e 'enum :: <un>; say ~un'
un

There is a passing test in S12-enums/misc.t added with commit 
https://github.com/perl6/roast/commit/ef7e1258e5

I'm closing this ticket now.