lvref.t: To-do tests for hashes

Concerning the error message tests, ‘parenthesized hash’ would be more
helpful than ‘hash dereference’ or ‘private hash’ (as would be provided
by OP_DESC), as %foo doesn’t look like a hash dereference and ‘private
hash’ suggests that \%foo= won’t work, whereas it will.
Simple \@array and \%hash assignment

Parentheses do not work yet.  Neither does local.
lvref.t: Test assigning non-array to array

Same with hashes.
lvref.t: Tests for localised arrays and hashes
Assignment to \local @array and \local %hash

Doesn’t work with lhs parentheses yet.