> Update: It is possible (though usually very tedious) to put debug statements into a sort block
In this case I'd rather replace the sort block with a function, it's match easier to set breakpoints and watch expressions then.
DB<1> sub by_num { return $a <=> $b }
DB<2> x [sort by_num 1,11,2,12]
0 ARRAY(0x334b888)
0 1
1 2
2 11
3 12
DB<3>
update
added return to make mechanism obvious.
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