+ is_deeply(
+ $index->ranges({ pagesize=>10, context=>5 }),
+ # after forwarding 'kuap' to 'lc'
+ # disallow backtracking of 'lguq' to 'lc' to prevent qw[-k l-]
+ # so only lookahead (to 'lkq') remains
+ [qw(-k l-lj lk-)],
+ 'lookbehind after full lookahead'
+ );