any extra that we are passed we should dup #638
Merged
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Fixes #628
We modify the extra data that is passed in for utf-8 encoding, but that is a problem if there are frozen objects passed in. So to fix that we can dup the extra object that is passed in which will unfreeze it. We can't use our
deep_copy
because that uses clone which maintains the frozen status. So I added adeep_dup
which is the same asdeep_copy
but calls dup instead.