bug#49132: guix substitute: backtrace when the network is disabled during substitution

[Maxime Devos <maximedevos@telenet.be>]

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X-Debbugs-CC: ludo@gnu.org 48903@debbugs.gnu.org maxim.cournoyer@gmail.com
tags: + substituter

Ludovic Courtès schreef op vr 11-06-2021 om 17:09 [+0200]:
> Hi Maxim{,e}!
> 
> Maxime Devos <maximedevos@telenet.be> skribis:
> 
> > > 122.8 MB will be downloaded
> > >  libreoffice-6.4.7.2  117.1MiB                                  344KiB/s 03:04 [#########         ]  52.7%guix substitute: error: TLS error in procedure 'read_from_session_record_port': Error decoding the received TLS packet.
> > > substitution of /gnu/store/44h13hn5zssfppz67vydxcf95qsc8qfw-libreoffice-6.4.7.2 failed
> > > guix package: error: some substitutes for the outputs of derivation `/gnu/store/9f8sffldy39mprihx6xgrs7hys9j75jm-libreoffice-6.4.7.2.drv' failed (usually happens due to networking issues); try `--fallback' to build derivation from source
> > > --8<---------------cut here---------------end--------------->8---
> > > 
> > 
> > I often have the same problem when I do "guix package -u".
> > (Same error message, same package libreoffice, same derivation)
> > (Usually libreoffice, sometimes with other packages as well.)
> 
> As a first step, can you reproduce the bug like this:
> 
>   while echo substitute /gnu/store/44h13hn5zssfppz67vydxcf95qsc8qfw-libreoffice-6.4.7.2 /tmp/t | guix substitute --substitute ; do chmod -R +w /tmp/t && rm -rf /tmp/t; done
> 
> ?

I cannot reproduce either, with

$ guix describe
Generatie 97	23:40:15 19 jun 2021	(huidig)
  guix 3aabe51
    bewaarplaats-URL: https://git.savannah.gnu.org/git/guix.git
    tak: master
    commit: 3aabe51e8c09b9a2a87c03c40e3cc0f90d531bfd
  nonguix d81564f
    bewaarplaats-URL: https://gitlab.com/nonguix/nonguix
    tak: master
    commit: d81564f21e7d8800e6f6187fe2e1f6476e06bc30

so I wondered whether it is a networking issue,
so I disabled & re-enabled wireless networking during the substitution
and encountered a (to my knowledge) previously-unknown backtrace:

$ while (echo substitute /gnu/store/44h13hn5zssfppz67vydxcf95qsc8qfw-libreoffice-6.4.7.2 /tmp/t && echo substitute /gnu/store/j0j7z6ckarjs9yi77sncszbmdgy38s70-guix-1.3.0-4.4985a42 /tmp/u) | guix
substitute --substitute ; do chmod -R +w /tmp/t && rm -rf /tmp/t && chmod -R +w /tmp/u && rm -rf /tmp/u ; done

http://ci.guix.gnu.org/nar/lzip/44h13hn5zssfppz67vydxcf95qsc8qfw-libreoffice-6.4.7.2 aan het binnenhalen ...
 libreoffice-6.4.7.2  117.1MiB        1.7MiB/s 01:08 [##################] 100.0%

http://ci.guix.gnu.org/nar/lzip/j0j7z6ckarjs9yi77sncszbmdgy38s70-guix-1.3.0-4.4985a42 aan het binnenhalen ...
guix-1.3.0-4.4985a42  36.1MiB        223KiB/s 01:53 [############      ]  67.9%Backtrace:
In guix/serialization.scm:
   468:33 19 (read "/tmp/u/share/guile/site/3.0" _)
   468:33 18 (read "/tmp/u/share/guile/site/3.0/gnu" _)
   468:33 17 (read "/tmp/u/share/guile/site/3.0/gnu/packages" _)
   442:24 16 (read "/tmp/u/share/guile/site/3.0/gnu/packages/crates…" …)
   525:24 15 (_ "/tmp/u/share/guile/site/3.0/gnu/packages/crates-io…" …)
In ice-9/ports.scm:
   433:17 14 (call-with-output-file _ _ #:binary _ #:encoding _)
In guix/serialization.scm:
   247:20 13 (dump #<input: string 7f0d0b7d3d90> #<output: /tmp/u/s…> …)
In unknown file:
          12 (get-bytevector-n! #<input: string 7f0d0b7d3d90> # 0 #)
In gcrypt/hash.scm:
   223:13 11 (read! #vu8(32 32 40 97 114 103 117 109 101 110 116 # …) …)
In unknown file:
          10 (get-bytevector-n! #<input: string 7f0d0b7d3e00> # 0 #)
In lzlib.scm:
    501:4  9 (lzread! #<lz-decoder 7f0d0b7d5ef0> #<input: string 7f…> …)
In unknown file:
           8 (get-bytevector-n #<input: string 7f0d0b7d3e70> 65537)
In guix/progress.scm:
   368:31  7 (read! _ _ _)
In unknown file:
           6 (get-bytevector-n! #<input: string 7f0d0a15e4d0> # 0 #)
In web/response.scm:
     95:2  5 (read! _ _ _)
In ice-9/boot-9.scm:
  1685:16  4 (raise-exception _ #:continuable? _)
  1685:16  3 (raise-exception _ #:continuable? _)
  1780:13  2 (_ #<&compound-exception components: (#<&error> #<&irri…>)
  1685:16  1 (raise-exception _ #:continuable? _)
  1685:16  0 (raise-exception _ #:continuable? _)

ice-9/boot-9.scm:1685:16: In procedure raise-exception:
Throw to key `bad-response' with args `("EOF while reading response body: ~a bytes of ~a" (26017808 37842870))'.

This seems like a separate issue from #48903 though,
so I opened a new bug report.

Greetings,
Maxime.

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