Traceback (most recent call last):


 "/opt/ros/kinetic/bin/roswtf", line 35, in <module>

roswtf.roswtf_main()


 "/opt/ros/kinetic/lib/python2.7/dist-packages/roswtf/__init__.py", line 89, in roswtf_main

_roswtf_main()


 "/opt/ros/kinetic/lib/python2.7/dist-packages/roswtf/__init__.py", line 172, in _roswtf_main

wtf_check_environment(ctx)


 "/opt/ros/kinetic/lib/python2.7/dist-packages/roswtf/environment.py", line 219, in wtf_check_environment

error_rule(r, r[0](ctx), ctx)


 "/opt/ros/kinetic/lib/python2.7/dist-packages/roswtf/rules.py", line 100, in error_rule

_check_rule(rule, ret, ctx, ctx.errors, WtfError)


 "/opt/ros/kinetic/lib/python2.7/dist-packages/roswtf/rules.py", line 71, in _check_rule

ctx_list.append(level(f_msg%d + ret%d, f_msg, ret))
ValueError: unsupported format character 'w' (0x77) at index 51

Traceback (most recent call last):

 "test.py", line 26, in <module>
parent = Parent(children=[Child()])

 "<string>", line 4, in __init__

 "/Users/lars/coding/sqlalchemy_association_object_test/venv/lib/python3.7/site-packages/sqlalchemy/orm/state.py", line 417, in _initialize_instance
manager.dispatch.init_failure(self, args, kwargs)

 "/Users/lars/coding/sqlalchemy_association_object_test/venv/lib/python3.7/site-packages/sqlalchemy/util/langhelpers.py", line 66, in __exit__
compat.reraise(exc_type, exc_value, exc_tb)

 "/Users/lars/coding/sqlalchemy_association_object_test/venv/lib/python3.7/site-packages/sqlalchemy/util/compat.py", line 249, in reraise
raise value

 "/Users/lars/coding/sqlalchemy_association_object_test/venv/lib/python3.7/site-packages/sqlalchemy/orm/state.py", line 414, in _initialize_instance
return manager.original_init(*mixed[1:], **kwargs)

 "/Users/lars/coding/sqlalchemy_association_object_test/venv/lib/python3.7/site-packages/sqlalchemy/ext/declarative/base.py", line 737, in _declarative_constructor
setattr(self, k, kwargs[k])

 "/Users/lars/coding/sqlalchemy_association_object_test/venv/lib/python3.7/site-packages/sqlalchemy/orm/attributes.py", line 229, in __set__
instance_dict(instance), value, None)

 "/Users/lars/coding/sqlalchemy_association_object_test/venv/lib/python3.7/site-packages/sqlalchemy/orm/attributes.py", line 1077, in set
initiator=evt)

 "/Users/lars/coding/sqlalchemy_association_object_test/venv/lib/python3.7/site-packages/sqlalchemy/orm/collections.py", line 762, in bulk_replace
appender(member, _sa_initiator=initiator)

 "/Users/lars/coding/sqlalchemy_association_object_test/venv/lib/python3.7/site-packages/sqlalchemy/orm/collections.py", line 1044, in append
item = __set(self, item, _sa_initiator)

 "/Users/lars/coding/sqlalchemy_association_object_test/venv/lib/python3.7/site-packages/sqlalchemy/orm/collections.py", line 1016, in __set
item = executor.fire_append_event(item, _sa_initiator)

 "/Users/lars/coding/sqlalchemy_association_object_test/venv/lib/python3.7/site-packages/sqlalchemy/orm/collections.py", line 680, in fire_append_event
item, initiator)

 "/Users/lars/coding/sqlalchemy_association_object_test/venv/lib/python3.7/site-packages/sqlalchemy/orm/attributes.py", line 943, in fire_append_event
state, value, initiator or self._append_token)

 "/Users/lars/coding/sqlalchemy_association_object_test/venv/lib/python3.7/site-packages/sqlalchemy/orm/attributes.py", line 1210, in emit_backref_from_collection_append_event
child_impl = child_state.manager[key].implKeyError: 'parent'