You claimed the current __PACKAGE__ affects the result of Foo->SUPER::can( 'bar' ):
when you start saying sub Foo::bar, the __PACKAGE__ doesn't change to Foo, so you have a problem with SUPER.
I posted code where changing packages, and thus __PACKAGE__, is inconsequential, contrary to your claim.
So the reasoning in my initial post about why the goto there is an infinite loop is correct.
Makeshifts last the longest.
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