TypeError: not all arguments converted during string formatting when running client sync

[PeterEdens]

I cloned the repo then cd to third_party and run gclient sync and an error occurs:

conceivas-iMac:third_party conimac$ gclient sync
Syncing projects: 100% (7/7), done.

________ running 'bash sync_webrtc.sh webrtc_fork_v1.0' in '/Users/conimac/Work/spreedme-iosapp/third_party'

________ running '/usr/bin/python -c import os,sys;script = os.path.join("trunk","check_root_dir.py");_ = os.system("%s %s" % (sys.executable,script)) if os.path.exists(script) else 0' in '/Users/conimac/Work/spreedme-iosapp/third_party/webrtc'

________ running '/usr/bin/python -u src/sync_chromium.py --target-revision 4664fe0d123f948bafa7b942717fc5847e61971c' in '/Users/conimac/Work/spreedme-iosapp/third_party/webrtc'
Error: Command '/usr/bin/python -u src/sync_chromium.py --target-revision 4664fe0d123f948bafa7b942717fc5847e61971c' returned non-zero exit status 1 in /Users/conimac/Work/spreedme-iosapp/third_party/webrtc
Running "gclient sync --force --revision src@4664fe0d123f948bafa7b942717fc5847e61971c --gclientfile .gclient.tmp --delete_unversioned_trees --reset --upstream --deps=ios,mac" in /Users/conimac/Work/spreedme-iosapp/third_party/webrtc/src/chromium
[0:01:20] Still working on:
[0:01:20] src
gclient(557) MergeWithOsDeps:Ignoring 'src/chrome/test/data/perf/canvas_bench':None in 'ios' deps_os
gclient(557) MergeWithOsDeps:Ignoring 'src/chrome/test/data/perf/frame_rate/content':None in 'ios' deps_os
gclient(557) MergeWithOsDeps:Ignoring 'src/native_client':None in 'ios' deps_os
gclient(557) MergeWithOsDeps:Ignoring 'src/third_party/ffmpeg':None in 'ios' deps_os
gclient(557) MergeWithOsDeps:Ignoring 'src/third_party/hunspell_dictionaries':None in 'ios' deps_os
gclient(557) MergeWithOsDeps:Ignoring 'src/third_party/hunspell':None in 'ios' deps_os
gclient(557) MergeWithOsDeps:Ignoring 'src/third_party/webgl':None in 'ios' deps_os
[0:01:27] Still working on:
[0:01:27] src

src/tools/gyp (ERROR)

[0:01:39] Started.
[0:01:41] Up-to-date; skipping checkout.
_____ src/tools/gyp at adb7d24b9fc166f01ab2da50478556b518a9218f

Traceback (most recent call last):
File "/Users/conimac/Work/spreedme-iosapp/depot_tools/gclient.py", line 2574, in
sys.exit(main(sys.argv[1:]))
File "/Users/conimac/Work/spreedme-iosapp/depot_tools/gclient.py", line 2560, in main
return dispatcher.execute(OptionParser(), argv)
File "/Users/conimac/Work/spreedme-iosapp/depot_tools/subcommand.py", line 252, in execute
return command(parser, args[1:])
File "/Users/conimac/Work/spreedme-iosapp/depot_tools/gclient.py", line 2315, in CMDsync
ret = client.RunOnDeps('update', args)
File "/Users/conimac/Work/spreedme-iosapp/depot_tools/gclient.py", line 1439, in RunOnDeps
work_queue.flush(revision_overrides, command, args, options=self._options)
File "/Users/conimac/Work/spreedme-iosapp/depot_tools/gclient_utils.py", line 1055, in run
self.item.run(*self.args, **self.kwargs)
File "/Users/conimac/Work/spreedme-iosapp/depot_tools/gclient.py", line 891, in run
self.ParseDepsFile()
File "/Users/conimac/Work/spreedme-iosapp/depot_tools/gclient.py", line 690, in ParseDepsFile
gclient_eval.Exec(deps_content, global_scope, local_scope, filepath)
File "/Users/conimac/Work/spreedme-iosapp/depot_tools/gclient_eval.py", line 209, in Exec
_visit_in_module(stmt)
File "/Users/conimac/Work/spreedme-iosapp/depot_tools/gclient_eval.py", line 193, in _visit_in_module
value = _gclient_eval(node.value, global_scope, filename=filename)
File "/Users/conimac/Work/spreedme-iosapp/depot_tools/gclient_eval.py", line 173, in _gclient_eval
return _convert(node_or_string)
File "/Users/conimac/Work/spreedme-iosapp/depot_tools/gclient_eval.py", line 146, in _convert
for k, v in zip(node.keys, node.values))
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/collections.py", line 57, in init
self.__update(*args, **kwds)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_abcoll.py", line 568, in update
for key, value in other:
File "/Users/conimac/Work/spreedme-iosapp/depot_tools/gclient_eval.py", line 146, in
for k, v in zip(node.keys, node.values))
File "/Users/conimac/Work/spreedme-iosapp/depot_tools/gclient_eval.py", line 146, in _convert
for k, v in zip(node.keys, node.values))
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/collections.py", line 57, in init
self.__update(*args, **kwds)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_abcoll.py", line 568, in update
for key, value in other:
File "/Users/conimac/Work/spreedme-iosapp/depot_tools/gclient_eval.py", line 146, in
for k, v in zip(node.keys, node.values))
File "/Users/conimac/Work/spreedme-iosapp/depot_tools/gclient_eval.py", line 165, in _convert
return _convert(node.left) + _convert(node.right)
File "/Users/conimac/Work/spreedme-iosapp/depot_tools/gclient_eval.py", line 167, in _convert
return _convert(node.left) % _convert(node.right)
TypeError: not all arguments converted during string formatting
Hook '/usr/bin/python -u src/sync_chromium.py --target-revision 4664fe0d123f948bafa7b942717fc5847e61971c' took 105.02 secs
gclient sync -r webrtc_fork_v1.0
Hook 'bash sync_webrtc.sh webrtc_fork_v1.0' took 110.90 secs