Re: [PATCH v2 7/7] unpack-trees: free cache_entry array members for merges

> Am 02.06.2013 19:59, schrieb Felipe Contreras:
>
>> On Sun, Jun 2, 2013 at 12:54 PM, René Scharfe
>> <rene.scharfe@lsrfire.ath.cx> wrote:
>>>
>>> Am 02.06.2013 19:25, schrieb Felipe Contreras:
>>>>
>>>>
>>>> On Sun, Jun 2, 2013 at 10:46 AM, René Scharfe
>>>> <rene.scharfe@lsrfire.ath.cx> wrote:
>>>>>
>>>>>
>>>>> +               for (i = 0; i < n; i++) {
>>>>> +                       struct cache_entry *ce = src[i + o->merge];
>>>>> +                       if (ce != o->df_conflict_entry)
>>>>
>>>>
>>>>
>>>> It's possible that ce is NULL, but you didn't add that check because
>>>> free(NULL) still works? Or because ce cannot be NULL?
>>>>
>>>> If it's the former, I think it's clearer if we check that ce is not
>>>> NULL either way.
>>>
>>>
>>>
>>> It is NULL if one tree misses an entry (e.g. a new or removed file). free
>>> handles NULL and we generally avoid duplicating its NULL-check.
>>
>>
>> Yeah, but I can see somebody adding code inside that 'if' clause to
>> print the cache entry, and see a crash only to wonder what's going on.
>> And to save what? 5 characters?
>
>
> The person adding code that depends on ce not being NULL needs to add that
> check as well.  Let's not worry too much about future changes that may or
> (more likely IMHO) may not be done.  The test suite covers this case
> multiple times, so such a mistake doesn't have a realistic chance to hit
> master.