bug#38050: Guix fails during downloading a substitute of google-brotli, throws an ugly backtrace

[Ludovic Courtès]

Hi Jan,

Jan Wielkiewicz <address@hidden> skribis:

> Guix fails during downloading a substitute of google-brotli, throws an
> ugly backtrace. That's basically it:
>
>  ad-progress
> /gnu/store/brvizic3qv469j8fd2xgsgx9p8s5s1j7-google-brotli-1.0.7-checkout
> https://ci.guix.gnu.org/nar/gzip/brvizic3qv469j8fd2xgsgx9p8s5s1j7-google-brotli-1.0.7-checkout
> 23583063 7880704 google-brotli-1.0.7-checkout  22.5MiB
>            663.5MiB/s 00:00 [##########        ]  58.7%substituting
> /gnu/store/m18k3ba7ywzk06005a0504yp4b6dczlf-graphite2-1.3.13.tgz...
> 14172160 google-brotli-1.0.7-checkout  22.5MiB
>    119.8MiB/s 00:00 [###############   ]  86.4%Backtrace: In
> guix/store.scm: 623:10 19 (call-with-store _) In
> guix/scripts/build.scm: 927:26 18 (_ #<store-connection 256.99
> 7f26acf88ea0>) In ice-9/boot-9.scm: 829:9 17 (catch _ _ #<procedure
> 7f26acf88ea0>7f269fcbab60 at ice-9/boot-9.sc…> …) In guix/ui.scm:
>     420:6 16 (_)
> In guix/scripts/build.scm:
>     892:5 15 (_)
> In srfi/srfi-1.scm:
>    679:15 14 (append-map _ _ . _)
>    592:17 13 (map1 ("x86_64-linux"))
>    679:15 12 (append-map _ _ . _)
>    592:17 11 (map1 (#<package jami@20191101.3.67671e7 gnu/packages/…>))
> In guix/scripts/build.scm:
>    853:18 10 (_ _)
> In guix/packages.scm:
>    948:16  9 (cache! #<weak-table 701/883> #<package jami@20191101.…> …)
> In guix/grafts.scm:
>     323:4  8 (graft-derivation #<store-connection 256.99 7f26acf88e…> …)
>     172:4  7 (references-oracle #<store-connection 256.99 7f26acf88…> …)
>    182:20  6 (_ _ _)
> In guix/store.scm:
>   1215:15  5 (_ #<store-connection 256.99 7f26acf88ea0> _ _)
>    718:13  4 (process-stderr _ _)
> In unknown file:
>            3 (display "@ substituter-succeeded /gnu/store/9hblvli1z…" …)
> In guix/status.scm:
>    691:16  2 (write! _ _ _)
>     605:6  1 (_ (download-progress "/gnu/store/brvizic3qv469j8fd…" …) …)
> In guix/progress.scm:
>    219:14  0 (display-download-progress "google-brotli-@" #f # _ # _ …)
>
> guix/progress.scm:219:14: In procedure display-download-progress:
> In procedure =: Wrong type: #f

Could you send the log returned by:

  guix build --log-file 
/gnu/store/brvizic3qv469j8fd2xgsgx9p8s5s1j7-google-brotli-1.0.7-checkout

?

It looks like the download code provided invalid data, which led (guix
status) to pass transferred = #false to ‘display-download-progress’.  I
can’t reproduce it, though.

Thanks,
Ludo’.