Bug#954195: Bug#969271: gnome-music fails to start: AttributeError: 'NoneType' object has no attribute 'call_is_supported_provider'

[Simon McVittie]

Control: tags -1 + confirmed
Control: forwarded -1 https://gitlab.gnome.org/GNOME/gnome-music/-/issues/410

On Sun, 30 Aug 2020 at 14:53:49 +0100, Simon McVittie wrote:
> On Sat, 28 Mar 2020 at 07:46:39 +0100, navaneeth wrote:
> > AttributeError: 'NoneType' object has no attribute 'call_is_supported_provider'
> 
> This is a different bug and should be dealt with separately, even though
> the high-level symptom (gnome-music not starting) is the same. I've cloned
> the bug report so that it gets a new bug number.

This crash happens when gnome-online-accounts is not installed (it's not
meant to be a requirement, but the code that interacts with GOA is not
sufficiently robust).

To reproduce the bug:
- remove the gnome-online-accounts package
- kill any remaining goa-* service processes

Workaround: install gnome-online-accounts.

    smcv