Exception: testmanager.listRootCatalogs: object of type 'type' has no len()

[ixolt@…]

How to Reproduce

While doing a GET operation on /rpc, Trac issued an internal error.

(please provide additional details here)

Request parameters:

{}

User agent: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.81 Safari/537.36

System Information

Trac	1.0.6post2
Docutils	0.10
Genshi	0.7 (without speedups)
mod_wsgi	3.5 (WSGIProcessGroup WSGIApplicationGroup trac.biddocsonline.com|)
MySQL	server: "5.5.40", client: "5.5.40", thread-safe: 1
MySQLdb	1.2.3c1
Pygments	1.6
Python	2.7.6 (default, Jan 22 2015, 15:49:12) [GCC 4.1.2 20070626 (Red Hat 4.1.2-14)]
pytz	2014.4
RPC	1.1.3
setuptools	7.0
jQuery	1.7.2
jQuery UI	1.8.21
jQuery Timepicker	1.0.1

Enabled Plugins

EstimationTools	0.3dev-r11777
TestManager	1.8.2
TracGenericClass	1.1.6
TracGenericWorkflow	1.0.5
TracXMLRPC	1.1.3

Python Traceback

Traceback (most recent call last):
  File "build/bdist.linux-x86_64/egg/trac/web/main.py", line 534, in _dispatch_request
    dispatcher.dispatch(req)
  File "build/bdist.linux-x86_64/egg/trac/web/main.py", line 227, in dispatch
    resp = chosen_handler.process_request(req)
  File "/opt/***/python/lib/python2.7/site-packages/TracXMLRPC-1.1.3-py2.7.egg/tracrpc/web_ui.py", line 72, in process_request
    return self._dump_docs(req)
  File "/opt/***/python/lib/python2.7/site-packages/TracXMLRPC-1.1.3-py2.7.egg/tracrpc/web_ui.py", line 111, in _dump_docs
    str(e), out.getvalue()))
Exception: testmanager.listRootCatalogs: object of type 'type' has no len()
Traceback (most recent call last):
  File "/opt/***/python/lib/python2.7/site-packages/TracXMLRPC-1.1.3-py2.7.egg/tracrpc/web_ui.py", line 101, in _dump_docs
    (method.signature,
  File "/opt/***/python/lib/python2.7/site-packages/TracXMLRPC-1.1.3-py2.7.egg/tracrpc/api.py", line 230, in _get_signature
    if len(sig) < len(sigcand):
TypeError: object of type 'type' has no len()

[Jun Omae]

PluginIssue (​th:TestManagerForTracPlugin, ​th:#12301).