Hello

I found Data::Dumper::Names with this thread . In this manual of Data::Dumper::Names, there is "Unknown Variables" section.

"Unknown Variables" section seems to me having some relation with your case... not printing name "$x".

update:
Sorry if I am looking into wrong direction.

In reply to Re^3: Inspecting the name of a variable by remiah
in thread Inspecting the name of a variable by LanX

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