Dynamically added SPs in SP plot might miss labels

[jgosmann]

I have a model that is generating new Semantic Pointers while running (with Vocabulary.parse) and those get added to the legend of the Semantic Pointer plot without a name until at some point they suddenly appear with name.

[tcstewar]

Yikes. Hmm... here's a minimal example that gives similar effects:

import nengo
import nengo.spa as spa

model = spa.SPA()
with model:
    model.state = spa.State(64)

    def create(t):
        index = int(t / 0.1)
        return 'A%d' % index

    model.input = spa.Input(state=create)

If you run that, you get this:

To add to the bug, if you reset time, A1 appears in the list. And then if you run the simulation again and then rewind a bit, you get this: