bug#24140: Substitute hash mismatches not properly reported

[Ludovic Courtès]

ludo@gnu.org (Ludovic Courtès) skribis:

> When using ‘guix package’, upon a substitute hash mismatch, all we see
> is something like this:
>
> Found valid signature for 
> /gnu/store/cpw9yca1mcqhqfq450dr3rz2jzr95l69-glib-2.48.0
>>From 
>>https://mirror.hydra.gnu.org/nar/cpw9yca1mcqhqfq450dr3rz2jzr95l69-glib-2.48.0
> Downloading cpw9yc...-glib-2.48.0 (13.5MiB installed)...
>  glib-2.48.0                                                                  
>                   744KiB/s 00:04 | 2.9MiB transferred
> killing process 11821
> guix system: error: build failed: some substitutes for the outputs of 
> derivation `/gnu/store/lkvlm17z8qm1v6r4n5ja5vcmsp7d860i-graphviz-2.38.0.drv' 
> failed (usually happens due to networking issues); try `--fallback' to build 
> derivation from source 
>
>
> The error message from build.cc:
>
>       if (expectedHash != actualHash)
>           throw SubstError(format("hash mismatch in downloaded path `%1%': 
> expected %2%, got %3%")
>               % storePath % printHash(expectedHash) % printHash(actualHash));
>
> … is only visible when we set-build-options #:print-build-trace? #t
> (like ‘guix build’ does, but ‘guix package’ and others do not.)
>
> The message should always be displayed, regardless of
> #:print-build-trace?.

Fixed long ago, at least with the introduction of (guix status).  Closing!