@q crashes program with NoneType object has no attribute f_lineno

[robintw]

I'm using the @q decorator in a program to try and work out how it is running. When I run the program I find that it crashes because of an error within q:

Traceback (most recent call last):
  File "/opt/anaconda3/envs/python2/bin/rio", line 9, in <module>
    load_entry_point('rasterio', 'console_scripts', 'rio')()
  File "/opt/anaconda3/envs/python2/lib/python2.7/site-packages/click/core.py", line 716, in __call__
    return self.main(*args, **kwargs)
  File "/opt/anaconda3/envs/python2/lib/python2.7/site-packages/click/core.py", line 696, in main
    rv = self.invoke(ctx)
  File "/opt/anaconda3/envs/python2/lib/python2.7/site-packages/click/core.py", line 1058, in invoke
    sub_ctx = cmd.make_context(cmd_name, args, parent=ctx)
  File "/opt/anaconda3/envs/python2/lib/python2.7/site-packages/click/core.py", line 620, in make_context
    self.parse_args(ctx, args)
  File "/opt/anaconda3/envs/python2/lib/python2.7/site-packages/click/core.py", line 874, in parse_args
    value, args = param.handle_parse_result(ctx, opts, args)
  File "/opt/anaconda3/envs/python2/lib/python2.7/site-packages/click/core.py", line 1398, in handle_parse_result
    self.callback, ctx, self, value)
  File "/opt/anaconda3/envs/python2/lib/python2.7/site-packages/click/core.py", line 76, in invoke_param_callback
    return callback(ctx, value)
  File "/opt/anaconda3/envs/python2/lib/python2.7/site-packages/q-2.6-py2.7.egg/q.py", line 284, in wrapper
    info = self.inspect.getframeinfo(etb.tb_next, context=3)
  File "/opt/anaconda3/envs/python2/lib/python2.7/inspect.py", line 1005, in getframeinfo
    lineno = frame.f_lineno
AttributeError: 'NoneType' object has no attribute 'f_lineno'

Any ideas on what's going wrong here and how it can be fixed?