I have tried setting $.

Interestingly:

while (<DATA>) { chomp; warn "<$_>"; }
warn "One";
$. = 123;
warn "Two";
close DATA;
warn "Three";
$. = 456;
warn "Four";
__DATA__
Zero

[download]

Gives:

<Zero> at - line 1, <DATA> line 1.
One at - line 2, <DATA> line 1.
Two at - line 4, <DATA> line 123.
Three at - line 6.
Four at - line 8, <DATA> line 456.

[download]

And yet, it's a hack. Better to implement the message yourself.

In reply to Re: Here there be cammels! by Anonymous Monk
in thread Here there be cammels! by hildred

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