Fail with latest xcode

[studywithallofyou]

Traceback (most recent call last):
File "/usr/bin/isign", line 5, in
pkg_resources.run_script('isign==1.6.15.1566551957.dev29-root', 'isign')
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 540, in run_script
self.require(requires)[0].run_script(script_name, ns)
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 1455, in run_script
execfile(script_filename, namespace, namespace)
File "/usr/lib/python2.7/site-packages/isign-1.6.15.1566551957.dev29_root-py2.7.egg/EGG-INFO/scripts/isign", line 252, in
isign.resign(app_path, **kwargs)
File "/usr/lib/python2.7/site-packages/isign-1.6.15.1566551957.dev29_root-py2.7.egg/isign/isign.py", line 81, in resign
alternate_entitlements_path)
File "/usr/lib/python2.7/site-packages/isign-1.6.15.1566551957.dev29_root-py2.7.egg/isign/archive.py", line 400, in resign
ua.bundle.resign(deep, signer, provisioning_profile, alternate_entitlements_path)
File "/usr/lib/python2.7/site-packages/isign-1.6.15.1566551957.dev29_root-py2.7.egg/isign/bundle.py", line 262, in resign
super(App, self).resign(deep, signer)
File "/usr/lib/python2.7/site-packages/isign-1.6.15.1566551957.dev29_root-py2.7.egg/isign/bundle.py", line 177, in resign
self.sign(deep, signer)
File "/usr/lib/python2.7/site-packages/isign-1.6.15.1566551957.dev29_root-py2.7.egg/isign/bundle.py", line 172, in sign
executable = self.signable_class(self, self.get_executable_path(), signer)
File "/usr/lib/python2.7/site-packages/isign-1.6.15.1566551957.dev29_root-py2.7.egg/isign/signable.py", line 42, in init
self.m = macho.MachoFile.parse_stream(self.f)
File "/usr/lib/python2.7/site-packages/construct-2.5.2-py2.7.egg/construct/core.py", line 198, in parse_stream
return self._parse(stream, Container())
File "/usr/lib/python2.7/site-packages/construct-2.5.2-py2.7.egg/construct/core.py", line 670, in _parse
subobj = sc._parse(stream, context)
File "/usr/lib/python2.7/site-packages/construct-2.5.2-py2.7.egg/construct/core.py", line 851, in _parse
obj = self.cases.get(key, self.default)._parse(stream, context)
File "/usr/lib/python2.7/site-packages/construct-2.5.2-py2.7.egg/construct/core.py", line 670, in _parse
subobj = sc._parse(stream, context)
File "/usr/lib/python2.7/site-packages/construct-2.5.2-py2.7.egg/construct/core.py", line 271, in _parse
return self.subcon._parse(stream, context)
File "/usr/lib/python2.7/site-packages/construct-2.5.2-py2.7.egg/construct/core.py", line 445, in _parse
raise ArrayError("expected %d, found %d" % (count, c), sys.exc_info()[1])
construct.core.ArrayError: ('expected 21, found 9', MappingError('no decoding mapping for 50 [cmd]',))