[Bug 1574213] Re: git gui and gitk broken after upgrade to 16.04

[Pawel Kraszewski]

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)

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https://bugs.launchpad.net/bugs/1574213

Title:
  git gui and gitk broken after upgrade to 16.04

Status in git package in Ubuntu:
  Confirmed

Bug description:
  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

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