It's hard to search for possible answers to this, though I've ried exhaustively. It's particularly curious that I've never run into it before, as it seems like it'd be pretty common. In essence, the second read from the FILE handle doesn't work. Why? 

open FILE, "foo" || die "can't open file"; # assume -T foo

for my $line (<FILE>) {
    my $x = <FILE>;
    if (!defined($x)) {
        print "couldn't read from filehandle.\n";
    }
}

[download]

Assume that foo is an arbitrarily large text file.

Dan Heller
http://www.danheller.com

In reply to nested <FILE> read returns undefined? by argv

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