Pressing stop while music is playing crashes promoe

[stuaxo]

Start promoe.

Press stop with the mouse or the v key: nothing happens.

Start music playing.

Press v:

QT_QPA_PLATFORM=xcb promoe
terminate called after throwing an instance of 'Xmms::not_dict_error'
  what():  Value is not a dict
[1]    25304 IOT instruction (core dumped)  QT_QPA_PLATFORM=xcb promoe

[stuaxo]

When you press stop, it looks like XMMS2 emits a volume changed event with NONE as the data instead of a dict:

https://github.com/xmms2/xmms2-devel/blob/02ed2361d5956e9e24e22efce9d23a4edcb663a6/src/xmms/output.c#L1216

This causes the callback to fail in promoe.

I don't know enough about xmm2 to know what the significance of xmms2 sending none here is - is that how it tells a client that audio is now off completely ?

In which case the callback probably should handle it.

Or is this something that xmms2 needs to fix so it always returns a dict?