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for ([0,0], [0,1], [1,0], [1,1]) { my ($phys_clump, $mutate_orig) = @$_; ... $got = $clump->uniqvec->unpdl; is_deeply $got, [[(3)x3]], "phys_clump=$phys_clump mutate_orig=$muta +te_orig uniqvec" or diag explain $got; }