If I add

use overload '0+' => \#
sub num { print "[$_[0]->[0]]"; return $_[0]->[0]; }

[download]

I get:

[1][1]1 == 1
1 != 3
1 != 4
[1][3]3 != 1
3 == 3
3 != 4
[1][4]4 != 1
4 != 3
4 == 4

[download]

In other words, it fails on each first pass of the inner loop. (In might also be failing on the first pass of the outer loop, but we can't tell.) I don't know what that means, though.

In reply to Re: Weird interaction of tie and overload by ikegami
in thread Weird interaction of tie and overload by rg0now

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