Your code does not define a sub within a sub, but a sub within a code block.
Actually, the sub  level1 is defined (and called) within an explicit scope, not within a code block.

Since there are no lexicals also defined within the scope and referred to by the subroutine, the scope has no effect; subroutines themselves are globally scoped.

In reply to Re^2: Defining a sub within a sub: OK? by AnomalousMonk
in thread Defining a sub within a sub: OK? by talexb

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