I didn't mean for "not reasonable" to sound like your request is unreasonable. Just that setting the warning there isn't ideal because my_sub could be something like:
sub my_sub {
my $closed_handle = shift;
die "For some reason our handle isn't closed yet."
if $closed_handle->opened;
}
...or
close $fh or my_sub($fh);
sub my_sub {
my $handle = shift;
my $error = $handle->error;
die "Got this error code: $error\n" if $error;
}
...or even...
# Open a handle only if it's not opened.
sub my_sub {
open $_[0], '<', $_[1] if !$_[0]->opened;
}
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