The thaw function in FreezeThaw returns an array which you are assigning to a scalar. The scalar ($copy) therefore ends up getting the number of elements in the array (in this case 1).

Try replacing your code with this:

($copy) = thaw freeze $hashref;

[download]

to force an array assignment.

--
<http://www.dave.org.uk>

"Perl makes the fun jobs fun
and the boring jobs bearable" - me

In reply to Re: deep copy of nested data structure by davorg
in thread deep copy of nested data structure by klash

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