lyx2lyx error not as informative when opening newer file

[Richard Kimberly Heck]

On 12/10/22 09:22, Scott Kostyshak wrote:
> If you open a new .lyx file than the lyx2lyx version can handle we used to get:
>
>    <file> is from a newer version of LyX and the lyx2lyx script failed to convert it.
>
> Now we get:
>
>    <file> is not a readable LyX document.
>
> You can test this by just manually incremending the number in the first
> line of a .lyx file.
>
> Bisect leads to:
>    
>    commit fb7b7e5223bc0a03e5b4a89b15f1be0bc0d05385
>    Author: Yuriy Skalko <yuriy.skalko at gmail.com>
>    Date:   Fri Sep 11 00:22:55 2020 +0300
>    
>        Refactor runCommand
>    
> Yuriy, do you by chance have time to take a look? If not, no problem, I
> can take a look.

This seems like a genuine bug. Something is wrong with the return values.

Riki