redshift-gtk crashed with SyntaxError in find_cookie(): invalid or missing encoding declaration for '/usr/bin/sys'

[Anders Kaseorg]

‘redshift-gtk’ crashes on startup if the ‘openafs-client’ package (which contains /usr/bin/sys) is also installed.

$ redshift-gtk
Traceback (most recent call last):
  File "/usr/lib/python3.5/tokenize.py", line 392, in find_cookie
    line_string = line.decode('utf-8')
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x80 in position 40: invalid start byte

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/bin/redshift-gtk", line 26, in <module>
    from redshift_gtk.statusicon import run
  File "/usr/lib/python3/dist-packages/redshift_gtk/statusicon.py", line 32, in <module>
    from gi.repository import Gtk, GLib, GObject
  File "<frozen importlib._bootstrap>", line 969, in _find_and_load
  File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 664, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 634, in _load_backward_compatible
  File "/usr/lib/python3/dist-packages/gi/importer.py", line 115, in load_module
    dynamic_module = load_overrides(introspection_module)
  File "/usr/lib/python3.5/contextlib.py", line 66, in __exit__
    next(self.gen)
  File "/usr/lib/python3/dist-packages/gi/importer.py", line 78, in _check_require_version
    PyGIWarning, stacklevel=stacklevel)
  File "/usr/lib/python3.5/warnings.py", line 18, in showwarning
    file.write(formatwarning(message, category, filename, lineno, line))
  File "/usr/lib/python3.5/warnings.py", line 26, in formatwarning
    line = linecache.getline(filename, lineno) if line is None else line
  File "/usr/lib/python3.5/linecache.py", line 16, in getline
    lines = getlines(filename, module_globals)
  File "/usr/lib/python3.5/linecache.py", line 47, in getlines
    return updatecache(filename, module_globals)
  File "/usr/lib/python3.5/linecache.py", line 136, in updatecache
    with tokenize.open(fullname) as fp:
  File "/usr/lib/python3.5/tokenize.py", line 456, in open
    encoding, lines = detect_encoding(buffer.readline)
  File "/usr/lib/python3.5/tokenize.py", line 433, in detect_encoding
    encoding = find_cookie(first)
  File "/usr/lib/python3.5/tokenize.py", line 397, in find_cookie
    raise SyntaxError(msg)
SyntaxError: invalid or missing encoding declaration for '/usr/bin/sys'

ProblemType: Crash
DistroRelease: Ubuntu 16.04
Package: redshift-gtk 1.10-5ubuntu1
ProcVersionSignature: Ubuntu 4.2.0-19.23-generic 4.2.6
Uname: Linux 4.2.0-19-generic x86_64
NonfreeKernelModules: openafs
ApportVersion: 2.19.2-0ubuntu6
Architecture: amd64
CurrentDesktop: GNOME
Date: Thu Nov 19 02:07:22 2015
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/redshift-gtk
InstallationDate: Installed on 2015-06-02 (169 days ago)
InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Release amd64 (20150422)
InterpreterPath: /usr/bin/python3.5
PackageArchitecture: all
ProcCmdline: /usr/bin/python3 /usr/bin/redshift-gtk
PythonArgs: ['/usr/bin/redshift-gtk']
SourcePackage: redshift
Title: redshift-gtk crashed with SyntaxError in find_cookie(): invalid or missing encoding declaration for '/usr/bin/sys'
UpgradeStatus: Upgraded to xenial on 2015-10-28 (21 days ago)
UserGroups: adm bumblebee cdrom dip libvirtd lpadmin plugdev sambashare sbuild sudo wireshark

[Anders Kaseorg (andersk)]

Redshift upstream bug that Launchpad won’t let me link (because Redshift upstream used to track bugs in Launchpad):

https://github.com/jonls/redshift/issues/271

[Anders Kaseorg (andersk)]

Upstream patches:
https://github.com/jonls/redshift/commit/442fb9bd5df72e6eb89c34352882ac80f9c9660b
https://github.com/jonls/redshift/commit/56cef8d9cc2474e6e7382f9e702d35ab7f6355a8