ERROR      Brian 2 encountered an unexpected error. If you think this is a bug in Brian 2, please report this issue either to the discourse forum at <http://brian.discourse.group/>, or to the issue tracker at <https://github.com/brian-team/brian2/issues>. Please include this file with debug information in your report: /tmp/brian_debug_uqjbzqto.log  Additionally, you can also include a copy of the script that was run, available at: /tmp/brian_script_jlicglgz.py Thanks! [brian2]
Traceback (most recent call last):
  File "/home/wxie/local_pkgs/brian2/brian2/groups/group.py", line 351, in state
    var = self.variables[name]
  File "/home/wxie/local_pkgs/brian2/brian2/core/variables.py", line 1453, in __getitem__
    return self._variables[item]
KeyError: 'implementations'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/wxie/local_pkgs/brian2/brian2/groups/group.py", line 387, in __getattr__
    return self.state(name, use_units)
  File "/home/wxie/local_pkgs/brian2/brian2/groups/group.py", line 353, in state
    raise KeyError(f"State variable {name} not found.") from exc
KeyError: 'State variable implementations not found.'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/wxie/local_pkgs/brian2/brian2/core/network.py", line 892, in before_run
    obj.before_run(run_namespace)
  File "/home/wxie/local_pkgs/brian2/brian2/groups/group.py", line 1137, in before_run
    self.create_code_objects(run_namespace)
  File "/home/wxie/local_pkgs/brian2/brian2/groups/group.py", line 1130, in create_code_objects
    code_object = self.create_default_code_object(run_namespace)
  File "/home/wxie/local_pkgs/brian2/brian2/groups/group.py", line 1112, in create_default_code_object
    self.codeobj = create_runner_codeobj(group=self.group,
  File "/home/wxie/local_pkgs/brian2/brian2/codegen/codeobject.py", line 424, in create_runner_codeobj
    all_keywords = [_gather_compiler_kwds(var, codeobj_class)
  File "/home/wxie/local_pkgs/brian2/brian2/codegen/codeobject.py", line 424, in <listcomp>
    all_keywords = [_gather_compiler_kwds(var, codeobj_class)
  File "/home/wxie/local_pkgs/brian2/brian2/codegen/codeobject.py", line 239, in _gather_compiler_kwds
    all_kwds.append(_gather_compiler_kwds(dependency,
  File "/home/wxie/local_pkgs/brian2/brian2/codegen/codeobject.py", line 235, in _gather_compiler_kwds
    implementation = function.implementations[codeobj_class]
  File "/home/wxie/local_pkgs/brian2/brian2/groups/group.py", line 390, in __getattr__
    raise AttributeError(f"No attribute with name {name}")
AttributeError: No attribute with name implementations

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "example.py", line 25, in <module>
    run(0.35*ms, report='text')
  File "/home/wxie/local_pkgs/brian2/brian2/units/fundamentalunits.py", line 2428, in new_f
    result = f(*args, **kwds)
  File "/home/wxie/local_pkgs/brian2/brian2/core/magic.py", line 377, in run
    return magic_network.run(duration, report=report, report_period=report_period,
  File "/home/wxie/local_pkgs/brian2/brian2/core/magic.py", line 230, in run
    Network.run(self, duration, report=report, report_period=report_period,
  File "/home/wxie/local_pkgs/brian2/brian2/core/base.py", line 291, in device_override_decorated_function
    return getattr(curdev, name)(*args, **kwds)
  File "/home/wxie/local_pkgs/brian2/brian2/devices/cpp_standalone/device.py", line 1420, in network_run
    net.before_run(namespace)
  File "/home/wxie/local_pkgs/brian2/brian2/core/base.py", line 293, in device_override_decorated_function
    return func(*args, **kwds)
  File "/home/wxie/local_pkgs/brian2/brian2/core/network.py", line 894, in before_run
    raise BrianObjectException("An error occurred when preparing an object.", obj) from ex
brian2.core.base.BrianObjectException: Error encountered with object named 'neurongroup_run_regularly'.
Object was created here (most recent call only, full details in debug log):
  File 'example.py', line 24, in <module>
    input_neurons.run_regularly('rate=spike_rate(t, i)*kHz', dt=DT)

An error occurred when preparing an object. (See above for original error message and traceback.)