On Thu, May 30, 2013 at 7:17 PM, Thomas Rast <tr...@inf.ethz.ch> wrote:
> Felipe Contreras <felipe.contre...@gmail.com> writes:
>> We are supposedly adding files, to to which cache if 'the_index' is
>> discarded?
> [...]
>>       if (!current_head) {
>>               discard_cache();
>> +             if (read_cache() < 0)
>> +                     die(_("cannot read the index"));
>>               return;
>>       }
> It is not obvious to me that this is a correct change.  discard_cache()
> without subsequent reloading could also legitimately be used to empty
> the index.  So if you are fixing a bug, please justify the change and
> provide a testcase to guard against it in the future.

That discard_cache line I think came from fa9dcf8 (Fix performance
regression for partial commits - 2008-01-13). The code flow back then

if (initial_commit)

/* do something more */

A quick look from current code seems to indicate this pattern is still
valid for creating partial commits, where temporary index will be
thrown away afterwards. But I may be wrong.
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