Help me to understand your explanation of "assigning a hash reference to
a hash."

Considering 

my %params = {
    protocol => 2,
    interactive => 1,
    identity_files => [EMAIL PROTECTED],
};

It appears to have an even number of elements like a hash should (since
"=>" works essentially like ",") but the right hand side should be
delimited by () instead of {} for it to be properly assigned as the
value of a hash.  With {} the right hand side is really a hash reference
and has its location as its value which accounts for the error message
"Reference found where even-sized list expected"???

Thanks,

-tristram


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