$ arc diff --trace 
 ARGV  '/home/alexandre/Softs/arcanist/bin/../scripts/arcanist.php' 'diff' '--trace'
 LOAD  Loaded "phutil" from "/home/alexandre/Softs/libphutil/src".
 LOAD  Loaded "arcanist" from "/home/alexandre/Softs/arcanist/src".
Config: Reading user configuration file "/home/alexandre/.arcrc"...
Config: Did not find system configuration at "/etc/arcconfig".
Working Copy: Reading .arcconfig from "/home/alexandre/Atilla/eistiens-net-v3/.arcconfig".
Working Copy: Path "/home/alexandre/Atilla/eistiens-net-v3" is part of `git` working copy "/home/alexandre/Atilla/eistiens-net-v3".
Working Copy: Project root is at "/home/alexandre/Atilla/eistiens-net-v3".
Config: Did not find local configuration at "/home/alexandre/Atilla/eistiens-net-v3/.git/arc/config".
>>> [0] <conduit> user.whoami() <bytes = 117>
>>> [1] <http> https://phabricator.atilla.org/api/user.whoami
<<< [1] <http> 354,559 us
<<< [0] <conduit> 354,758 us
>>> [2] <exec> $ git diff --no-ext-diff --no-textconv --raw 'HEAD' --
>>> [3] <exec> $ git ls-files --others --exclude-standard
<<< [2] <exec> 6,911 us
<<< [3] <exec> 7,097 us
>>> [4] <exec> $ git diff-files --name-only
<<< [4] <exec> 4,072 us
>>> [5] <event> diff.didCollectChanges <listeners = 0>
<<< [5] <event> 51 us
>>> [6] <exec> $ git rev-parse --verify HEAD^
<<< [6] <exec> 4,632 us
>>> [7] <exec> $ git rev-parse --abbrev-ref --symbolic-full-name '@{upstream}'
<<< [7] <exec> 4,053 us
>>> [8] <exec> $ git rev-parse --git-dir
<<< [8] <exec> 6,273 us
>>> [9] <exec> $ git cat-file -t 'origin/dev'
<<< [9] <exec> 3,973 us
>>> [10] <exec> $ git merge-base 'origin/dev' HEAD
<<< [10] <exec> 4,804 us
>>> [11] <exec> $ git rev-parse 'HEAD'
<<< [11] <exec> 6,610 us
>>> [12] <exec> $ git log --first-parent --format=medium '2a5030adf12b624e57f91bfa27e7733d5adba10e'..'2943866cce67e95cf40c201394607358caf8f559'
<<< [12] <exec> 4,468 us
>>> [13] <conduit> differential.query() <bytes = 236>
>>> [14] <http> https://phabricator.atilla.org/api/differential.query
<<< [14] <http> 416,980 us
<<< [13] <conduit> 417,160 us
>>> [15] <conduit> differential.query() <bytes = 146>
>>> [16] <http> https://phabricator.atilla.org/api/differential.query
<<< [16] <http> 346,652 us
<<< [15] <conduit> 346,796 us
>>> [17] <conduit> differential.getcommitmessage() <bytes = 169>
>>> [18] <http> https://phabricator.atilla.org/api/differential.getcommitmessage
<<< [18] <http> 635,468 us
<<< [17] <conduit> 635,573 us
>>> [19] <conduit> differential.parsecommitmessage() <bytes = 540>
>>> [20] <http> https://phabricator.atilla.org/api/differential.parsecommitmessage
<<< [20] <http> 164,765 us
<<< [19] <conduit> 164,880 us
>>> [21] <event> diff.didBuildMessage <listeners = 0>
<<< [21] <event> 28 us
>>> [22] <exec> $ nvim  '/tmp/edit.5ham95kmeb8co4s0/differential-update-comments'
<<< [22] <exec> 1,360,996 us
Linting...
>>> [23] <exec> $ git rev-parse 'HEAD'
<<< [23] <exec> 4,404 us
>>> [24] <exec> $ git merge-base '2a5030adf12b624e57f91bfa27e7733d5adba10e' '2943866cce67e95cf40c201394607358caf8f559'
<<< [24] <exec> 4,442 us
>>> [25] <exec> $ git diff --no-ext-diff --no-textconv --raw '2a5030adf12b624e57f91bfa27e7733d5adba10e' --
<<< [25] <exec> 5,596 us
>>> [26] <exec> $ git diff --no-ext-diff --no-textconv --no-color --src-prefix=a/ --dst-prefix=b/ -U32767 -M -C '2a5030adf12b624e57f91bfa27e7733d5adba10e' --
<<< [26] <exec> 4,940 us
Examining paths for linter 'python-flake8'.
Found 12 matching paths for linter 'python-flake8'.
>>> [27] <exec> $ which 'flake8'
<<< [27] <exec> 3,572 us
>>> [28] <exec> $ which 'flake8'
<<< [28] <exec> 3,530 us
>>> [29] <exec> $ 'flake8' --version
<<< [29] <exec> 250,744 us
>>> [30] <lint> Python Flake8 multi-linter <paths = 12>
>>> [31] <exec> $ which 'flake8'
<<< [31] <exec> 3,369 us
>>> [32] <exec> $ 'flake8'  '/home/alexandre/Atilla/eistiens-net-v3/eistiens_net_v3/associations/__init__.py'
>>> [33] <exec> $ 'flake8'  '/home/alexandre/Atilla/eistiens-net-v3/eistiens_net_v3/associations/admin.py'
>>> [34] <exec> $ 'flake8'  '/home/alexandre/Atilla/eistiens-net-v3/eistiens_net_v3/associations/apps.py'
>>> [35] <exec> $ 'flake8'  '/home/alexandre/Atilla/eistiens-net-v3/eistiens_net_v3/associations/models.py'
>>> [36] <exec> $ 'flake8'  '/home/alexandre/Atilla/eistiens-net-v3/eistiens_net_v3/associations/tests.py'
>>> [37] <exec> $ 'flake8'  '/home/alexandre/Atilla/eistiens-net-v3/eistiens_net_v3/associations/views.py'
>>> [38] <exec> $ 'flake8'  '/home/alexandre/Atilla/eistiens-net-v3/eistiens_net_v3/common/__init__.py'
>>> [39] <exec> $ 'flake8'  '/home/alexandre/Atilla/eistiens-net-v3/eistiens_net_v3/common/admin.py'
<<< [30] <lint> 20,942 us
>>> [40] <lint> Python Flake8 multi-linter <paths = 12>
<<< [32] <exec> 901,371 us
>>> [41] <exec> $ 'flake8'  '/home/alexandre/Atilla/eistiens-net-v3/eistiens_net_v3/common/apps.py'
<<< [33] <exec> 981,108 us
>>> [42] <exec> $ 'flake8'  '/home/alexandre/Atilla/eistiens-net-v3/eistiens_net_v3/common/models.py'
<<< [35] <exec> 1,078,830 us
>>> [43] <exec> $ 'flake8'  '/home/alexandre/Atilla/eistiens-net-v3/eistiens_net_v3/common/tests.py'
<<< [37] <exec> 1,098,842 us
>>> [44] <exec> $ 'flake8'  '/home/alexandre/Atilla/eistiens-net-v3/eistiens_net_v3/common/views.py'
<<< [38] <exec> 1,166,326 us
<<< [36] <exec> 1,205,730 us
<<< [34] <exec> 1,236,651 us
<<< [39] <exec> 1,408,504 us
<<< [41] <exec> 664,376 us
<<< [42] <exec> 726,500 us
<<< [44] <exec> 628,548 us
<<< [43] <exec> 660,130 us
<<< [40] <lint> 1,714,888 us
>>> Lint for eistiens_net_v3/associations/admin.py:


   Error  (F401) flake8 1
    'admin' imported but unused

    >>>        1 from django.contrib import admin
               2 
               3 # Register your models here.
>>> Lint for eistiens_net_v3/associations/tests.py:


   Error  (F401) flake8 1
    'TestCase' imported but unused

    >>>        1 from django.test import TestCase
               2 
               3 # Create your tests here.
>>> Lint for eistiens_net_v3/associations/views.py:


   Error  (F401) flake8 1
    'render' imported but unused

    >>>        1 from django.shortcuts import render
               2 
               3 # Create your views here.
>>> Lint for eistiens_net_v3/common/admin.py:


   Error  (F401) flake8 1
    'admin' imported but unused

    >>>        1 from django.contrib import admin
               2 
               3 # Register your models here.
>>> Lint for eistiens_net_v3/common/tests.py:


   Error  (F401) flake8 1
    'TestCase' imported but unused

    >>>        1 from django.test import TestCase
               2 
               3 # Create your tests here.
>>> Lint for eistiens_net_v3/common/views.py:


   Error  (F401) flake8 1
    'render' imported but unused

    >>>        1 from django.shortcuts import render
               2 
               3 # Create your views here.
 LINT ERRORS  Lint raised errors!


Lint issued unresolved errors! Provide explanation to continue or press Enter
to abort.

>>> [45] <exec> $ bash -c 'true'
<<< [45] <exec> 5,264 us
    Explanation: yy
Running unit tests...
No unit test engine is configured for this project.
>>> [46] <exec> $ git rev-parse 'HEAD'
<<< [46] <exec> 5,584 us
>>> [47] <exec> $ git merge-base '2a5030adf12b624e57f91bfa27e7733d5adba10e' '2943866cce67e95cf40c201394607358caf8f559'
<<< [47] <exec> 7,376 us
>>> [48] <exec> $ git diff --no-ext-diff --no-textconv --no-color --src-prefix=a/ --dst-prefix=b/ -U32767 -M -C '2a5030adf12b624e57f91bfa27e7733d5adba10e' '2943866cce67e95cf40c201394607358caf8f559' --
<<< [48] <exec> 5,473 us
>>> [49] <exec> $ git rev-parse '2a5030adf12b624e57f91bfa27e7733d5adba10e'
<<< [49] <exec> 4,930 us
>>> [50] <exec> $ git symbolic-ref --quiet HEAD
<<< [50] <exec> 6,690 us
>>> [51] <exec> $ git log --format=medium -n16 '2a5030adf12b624e57f91bfa27e7733d5adba10e'
<<< [51] <exec> 4,708 us
>>> [52] <exec> $ git symbolic-ref --quiet HEAD
<<< [52] <exec> 6,464 us
>>> [53] <exec> $ git rev-parse --symbolic-full-name 'T20'@{upstream}
<<< [53] <exec> 4,148 us
>>> [54] <exec> $ git --version
<<< [54] <exec> 3,756 us
>>> [55] <exec> $ git ls-remote --get-url 'origin'
<<< [55] <exec> 4,405 us
>>> [56] <conduit> repository.query() <bytes = 214>
>>> [57] <http> https://phabricator.atilla.org/api/repository.query
<<< [57] <http> 296,314 us
<<< [56] <conduit> 296,432 us
>>> [58] <conduit> differential.creatediff() <bytes = 14,019>
>>> [59] <http> https://phabricator.atilla.org/api/differential.creatediff
<<< [59] <http> 4,967 us
<<< [58] <conduit> 5,077 us

[2016-09-21 06:40:16] EXCEPTION: (HTTPFutureHTTPResponseStatus) [HTTP/500] Internal Server Error
<html>
<head><title>500 Internal Server Error</title></head>
<body bgcolor="white">
<center><h1>500 Internal Server Error</h1></center>
<hr><center>nginx/1.6.2</center>
</body>
</html> at [<phutil>/src/future/http/BaseHTTPFuture.php:339]
arcanist(head=master, ref.master=a2ab38df78a9), phutil(head=master, ref.master=1341c014ca7c)
  #0 BaseHTTPFuture::parseRawHTTPResponse(string) called at [<phutil>/src/future/http/HTTPSFuture.php:415]
  #1 HTTPSFuture::isReady() called at [<phutil>/src/future/Future.php:37]
  #2 Future::resolve(NULL) called at [<phutil>/src/future/FutureProxy.php:34]
  #3 FutureProxy::resolve() called at [<phutil>/src/conduit/ConduitClient.php:64]
  #4 ConduitClient::callMethodSynchronous(string, array) called at [<arcanist>/src/workflow/ArcanistDiffWorkflow.php:518]
  #5 ArcanistDiffWorkflow::run() called at [<arcanist>/scripts/arcanist.php:392]