Re: cannot find Voice `uniqueContext0' with \context Staff

[James Lowe]

On 08/09/2020 20:15, Thomas Morley wrote:
> Hi,
>
> this came up in the german forum:
>
> \context Staff { b1 }
> \addlyrics { foo }
>
> results in not printed lyrics and the warning:
>
> warning: cannot find Voice `uniqueContext0'
> \addlyrics
>             { foo }
>
> It worked up to 2.18.2 but fails for 2.20.0 and upstream
>
> Changing the code to use
> \context Voice or \new Voice or \new Staff
> works.
>
> Cheers,
>    Harm

It seems it occurred somewhere in those builds that we can no longer 
compile by default. Also see: 
https://lists.gnu.org/archive/html/lilypond-devel/2020-02/msg01024.html

i.e. 2.19.12 does NOT have the warning and I cannot compile another 
build until 2.19.38 where the warning is already manifest.

I tried to do what David suggested in that email thread above but was 
unsuccessful with cherry picking (more my skills than David's 
instructions though), so this is going to be tedious to bisect I expect.

James