1. %Cls was assigned to an anonymous hash ref.

2. print func was called with hash in a scalar context.

Reason why you see 1/8 is :

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If there are any key/value pairs at all, the value returned is a string consisting of the number of used buckets and the number of allocated buckets, separated by a slash.

Reason why you see HASH(0x124290) => :

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B'coz you have the hash key assigned to a anon. hash ref and value as undef by default.

Hope this helps.