git gui and gitk broken after upgrade to 16.04

[mokabar]

git gui and gitk used to worked fine, but after upgrading to 16.04, they stopped working:

* git gui fails with "cannot determine git version"
* gitk fails with "cannot find a git repository here"

other git commands work like charm

[Daniel Benetti (daniel-netti)]

Same problem here.
I don't know what to do.

[mokabar (tim-klingt)]

funny thing: i have two machines with an almost identical setup ... i can only reproduce this on one of the machines

[Daniel Benetti (daniel-netti)]

There's a way to get the old version of gitk? The old version work?

[mokabar (tim-klingt)]

running gitk/git-gui via wish8.5 works around this issue

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[mokabar (tim-klingt)]

comment #4 is inaccurate: it seems to be an issue with tk: the tools fail to work until i reinstall tk8.6

[Clément Février (clement)]

The same bug is also present on a fresh install.

[Pawel Kraszewski (linuxpedia.pl)]

If at all helpful - prelink is causing this error in my system:

* All worked yesterday,
* I prelinked all the system (prelink -avRm) today morning
* gitk/git gui stopped working
* I unprelinked all system (prelink -auv)
* gitk/git gui resumed operation.

Reinstallation of TK might have helped (didn't in my case) because it reinstalled execs and libs with unprelinked versions.

HTH

[Pawel Kraszewski (linuxpedia.pl)]

I run one more iteration on a clean system - prelink is somehow altering MMAP/WAIT4 arguments of application. In prelinked version calls look like that:

mmap(<HEX>, 3967488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = <HEX>

in nonprelinked, respective call looks like that:

mmap(NULL, 3967488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = <HEX>

Look at the #1 argument - in prelinked it tries to force specific address, in nonprelinked it takes the default.

Major divergence appears here:

Prelinked (not working):
wait4(22031, [{WIFEXITED(s) && WEXITSTATUS(s) == 1}], 0, NULL)

Unprelined (working):
wait4(31256, 0x7ffde8467074, 0, NULL)