Failure running 'gclient sync' under src

src/clank (ERROR)
----------------------------------------
[0:00:00] Started.
[0:00:00] ________ unmanaged solution; skipping src/clank
----------------------------------------
Traceback (most recent call last):
  File "/Work/depot_tools/gclient.py", line 2293, in <module>
    sys.exit(main(sys.argv[1:]))
  File "/Work/depot_tools/gclient.py", line 2279, in main
    return dispatcher.execute(OptionParser(), argv)
  File "/Work/depot_tools/subcommand.py", line 252, in execute
    return command(parser, args[1:])
  File "/Work/depot_tools/gclient.py", line 2028, in CMDsync
    ret = client.RunOnDeps('update', args)
  File "/Work/depot_tools/gclient.py", line 1338, in RunOnDeps
    work_queue.flush(revision_overrides, command, args, options=self._options)
  File "/Work/depot_tools/gclient_utils.py", line 1047, in run
    self.item.run(*self.args, **self.kwargs)
  File "/Work/depot_tools/gclient.py", line 764, in run
    self.ParseDepsFile()
  File "/Work/depot_tools/gclient.py", line 658, in ParseDepsFile
    assert isinstance(dep_value, dict)
AssertionError

My .gclient file

solutions = [
 { "name"        : "src/clank",
   "url"         : "https://chrome-internal.googlesource.com/clank/internal/apps.git",
   "deps_file"   : ".DEPS.git",
   "managed"     : False,
   "custom_deps" : {
     'src/third_party/adobe/flash/binaries/ppapi/linux': None,
     'src/third_party/adobe/flash/binaries/ppapi/linux_x64': None,
     'src/third_party/adobe/flash/symbols/ppapi/linux': None,
     'src/third_party/adobe/flash/symbols/ppapi/linux_x64': None,
   },
   "custom_vars" : {"chromium_rev": "unmanaged"},
   "safesync_url": ""
 },
]
cache_dir = None