bug#22088: Non-deterministic daemon protocol errors

[Ludovic Courtès]

Mark H Weaver <address@hidden> skribis:

> Since updating my guix client (but not yet my server) to include the
> recent commits related to the protocol update, I'm seeing these errors
> non-deterministically while building things.  Retrying usually results
> in success.
>
> address@hidden:~/guix$ guix build -K openssl --cores=1
> substitute: updating list of substitutes from 'http://hydra.gnu.org'... 100.0%
> The following derivation will be built:
>    /gnu/store/5hzf27bgygjp5ah3bfy8m0aa93yazgk3-openssl-1.0.2e.drv
> guix build: error: build failed: EOF expected (protocol error?)

This is because the ‘build-things’ RPC would always use the new
protocol, even when talking to old daemons.

Fixed in 2734cbb.

Thanks, and sorry for the confusion!

Ludo’.