Re: [PATCH] send-email: don't call methods on undefined values

[Junio C Hamano <gitster@pobox.com>]

"brian m. carlson" <sandals@crustytoothpaste.net> writes:

> On Mon, Sep 09, 2013 at 09:45:10AM -0700, Junio C Hamano wrote:
>> "brian m. carlson" <sandals@crustytoothpaste.net> writes:
>> > --- a/git-send-email.perl
>> > +++ b/git-send-email.perl
>> > @@ -1234,7 +1234,7 @@ X-Mailer: git-send-email $gitversion
>> >  				if ($smtp->code == 220) {
>> >  					$smtp = Net::SMTP::SSL->start_SSL($smtp,
>> >  									  ssl_verify_params())
>> > -						or die "STARTTLS failed! ".$smtp->message;
>> > +						or die "STARTTLS failed! ".IO::Socket::SSL::errstr();
>> 
>> I agree that $smtp->message may be bogus at this point, but could
>> "require IO::Socket::SSL" have failed on us in ssl_verify_params?
>> In that degraded mode, we do not do SSL peer verification, but
>> otherwise we would still attempt to talk with the peer, and in such
>> a case, IO::Socket::SSL would not be available to us at this point,
>> no?
>
> Since Net::SMTP::SSL uses IO::Socket::SSL (in fact, it is an
> IO::Socket::SSL), we can be guaranteed that it is, in fact, available at
> this point.  I guess strictly we don't need that require in
> IO::Socket::SSL since we'll already be guaranteed that it exists by the
> require of Net::SMTP::SSL.

That "require" came from around $gmane/230533, which was about
making sure the update to pacify newer Net::SMTP::SSL does not break
folks with older packages, I think.

I just didn't/don't know the history of Net::SMTP::SSL, and that was
where my comments came from.

As long as "Net::SMTP::SSL uses IO::Socket::SSL" has been true since
the ancient past, I agree that that 'require' of the latter does not
need to be guarded by an 'eval'; at that point, we are already in
the Net::SMTP::SSL codepath.  And your patch I replied to should be
the right thing to do.

Thanks for clarifying.