Re: fatal error when diffing changed symlinks

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

Johannes Schindelin <Johannes.Schindelin@gmx.de> writes:

>> > When viewing a working tree file, oid.hash could be 0{40} and
>> > read_sha1_file() is not the right function to use to obtain the
>> > contents.
>> > 
>> > Both of these two need to pay attention to 0{40}, I think, as the
>> > user may be running "difftool -R --dir-diff" in which case the
>> > working tree would appear in the left hand side instead.
>> 
>> As a side note, I think even outside of 0{40}, this should be checking
>> the return value of read_sha1_file(). A corrupted repo should die(), not
>> segfault.
>
> I agree. I am on it.

Friendly ping, if only to make sure that we can keep a piece of this
thread in the more "recent" pile.

If you have other topics you need to perfect, I think it is OK to
postpone the fix on this topic a bit longer, but I'd hate to ship
two releases with a known breakage without an attempt to fix it, so
if you are otherwise occupied, I may encourage others (including me)
to take a look at this.  The new "difftool" also has a reported
regression somebody else expressed willingness to work on, which is
sort of blocked by everybody else not knowing the timeline on this
one.  cf. <20170303212836.GB13790@arch-attack.localdomain>

A patch series would be very welcome, but "Please go ahead if
somebody else has time, and I'll help reviewing" would be also
good.

Thanks.