Was forgetting for a minute that declaring $b there would actually scope it inside the loop.
This isn't quite true - the output of Deparse is wrong. The lexical is scoped wider than the loop, as can be seen here: 
$ perl585 -le '$x=99; my $x = $_ for 1..3; print $x'

$

[download]
(Note that $::x isn't printed, the lexical $x is instead.) However, the initialising and releasing of $x is scoped to within the loop.

That may be construed as a bug. There again, statement modifiers on my declarations are usally buggy, and are best avoided.

Dave.

In reply to Re^3: Mysterious append failure. by dave_the_m
in thread Mysterious append failure. by BrowserUk

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