From: Junio C Hamano <gitster@pobox.com>
Date: Mon, 20 Jun 2011 23:26:42 GMT
Subject: Re: [PATCH 2/3] Add a lot of dummy returns to avoid warnings with NO_NORETURN
Message-ID: <7v1uyoaxu5.fsf@alter.siamese.dyndns.org>
In-Reply-To: <20110620223705.GG32765@one.firstfloor.org>

Andi Kleen <andi@firstfloor.org> writes:

>> Please remember to think for yourself. ;-)  Junio generally gives good
>> advice, but if you don't see the wisdom in it, that's the time to ask
>> questions, not blindly do a wrong thing.
>
> To be honest it's still not clear to me what was wrong with patch (2).

For example.

    diff --git a/builtin/commit.c b/builtin/commit.c
    index 5286432..51ee2e5 100644
    --- a/builtin/commit.c
    +++ b/builtin/commit.c
    @@ -962,6 +962,7 @@ static const char *find_author_by_nickname(const char *name)
                    return strbuf_detach(&buf, NULL);
            }
            die(_("No existing author found with '%s'"), name);
    +	return NULL;
     }

When the above is applied and compiled without NO_NORETURN, the extra
return may be optimized out by the compiler as your commit log messages
said, but wouldn't it introduce a new warning:

  builtin/commit.c: In function 'find_author_by_nickname':
  builtin/commit.c:965: error: will never be executed

under -Wunreachable-code?