GNU bug report logs - #49132
guix substitute: backtrace when the network is disabled during substitution

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Package: guix; Severity: important; Reported by: Maxime Devos <maximedevos@HIDDEN>; dated Sun, 20 Jun 2021 11:09:02 UTC; Maintainer for guix is bug-guix@HIDDEN.
Severity set to 'important' from 'normal' Request was from Ludovic Courtès <ludo@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

Message received at 49132 <at> debbugs.gnu.org:


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From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
To: Maxime Devos <maximedevos@HIDDEN>
Subject: Re: bug#49132: guix substitute: backtrace when the network is
 disabled during substitution
References: <87bl8hvhgx.fsf@HIDDEN>
 <bd60b06842be6645d2947e49b709ad358e9516bc.camel@HIDDEN>
 <87wnr05tfz.fsf@HIDDEN>
 <1fa57b9edcd62f9bea334688da9c4f009507b268.camel@HIDDEN>
Date: Tue, 22 Jun 2021 16:06:02 +0200
In-Reply-To: <1fa57b9edcd62f9bea334688da9c4f009507b268.camel@HIDDEN>
 (Maxime Devos's message of "Sun, 20 Jun 2021 13:07:34 +0200")
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Hi,

Maxime Devos <maximedevos@HIDDEN> skribis:

> 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-libr=
eoffice-6.4.7.2 /tmp/t && echo substitute /gnu/store/j0j7z6ckarjs9yi77sncsz=
bmdgy38s70-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

[...]

> In lzlib.scm:
>     501:4  9 (lzread! #<lz-decoder 7f0d0b7d5ef0> #<input: string 7f=E2=80=
=A6> =E2=80=A6)
> 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=E2=
=80=A6>)
>   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))'.

Ah indeed, this is poorly handled.

I=E2=80=99m not really sure how to address it.  I/O ports are a nice abstra=
ction
as it allows you to transparently read =E2=80=9Cstreams=E2=80=9D from any m=
edium, but as
always, that also comes with opacity where the call site is not supposed
to know what kind of exceptions might be thrown deep down.

Thoughts?

Ludo=E2=80=99.




Information forwarded to bug-guix@HIDDEN:
bug#49132; Package guix. Full text available.

Message received at submit <at> debbugs.gnu.org:


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Subject: guix substitute: backtrace when the network is disabled during
 substitution
From: Maxime Devos <maximedevos@HIDDEN>
To: bug-guix@HIDDEN
Date: Sun, 20 Jun 2021 13:07:34 +0200
In-Reply-To: <87wnr05tfz.fsf@HIDDEN>
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X-Debbugs-CC: ludo@HIDDEN 48903 <at> debbugs.gnu.org maxim.cournoyer@HIDDEN
tags: + substituter

Ludovic Court=C3=A8s schreef op vr 11-06-2021 om 17:09 [+0200]:
> Hi Maxim{,e}!
>=20
> Maxime Devos <maximedevos@HIDDEN> skribis:
>=20
> > > 122.8 MB will be downloaded
> > >  libreoffice-6.4.7.2  117.1MiB                                  344Ki=
B/s 03:04 [#########         ]  52.7%guix substitute: error: TLS error in p=
rocedure 'read_from_session_record_port': Error decoding the received TLS p=
acket.
> > > substitution of /gnu/store/44h13hn5zssfppz67vydxcf95qsc8qfw-libreoffi=
ce-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 deri=
vation from source
> > > --8<---------------cut here---------------end--------------->8---
> > >=20
> >=20
> > 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.)
>=20
> As a first step, can you reproduce the bug like this:
>=20
>   while echo substitute /gnu/store/44h13hn5zssfppz67vydxcf95qsc8qfw-libre=
office-6.4.7.2 /tmp/t | guix substitute --substitute ; do chmod -R +w /tmp/=
t && rm -rf /tmp/t; done
>=20
> ?

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-libreo=
ffice-6.4.7.2 /tmp/t && echo substitute /gnu/store/j0j7z6ckarjs9yi77sncszbm=
dgy38s70-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-libreoffic=
e-6.4.7.2 aan het binnenhalen ...
 libreoffice-6.4.7.2  117.1MiB        1.7MiB/s 01:08 [##################] 1=
00.0%

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 [############      ]  6=
7.9%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=E2=80=
=A6" =E2=80=A6)
   525:24 15 (_ "/tmp/u/share/guile/site/3.0/gnu/packages/crates-io=E2=80=
=A6" =E2=80=A6)
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=E2=80=
=A6> =E2=80=A6)
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 # =E2=80=
=A6) =E2=80=A6)
In unknown file:
          10 (get-bytevector-n! #<input: string 7f0d0b7d3e00> # 0 #)
In lzlib.scm:
    501:4  9 (lzread! #<lz-decoder 7f0d0b7d5ef0> #<input: string 7f=E2=80=
=A6> =E2=80=A6)
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=E2=80=
=A6>)
  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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Acknowledgement sent to Maxime Devos <maximedevos@HIDDEN>:
New bug report received and forwarded. Copy sent to ludo@HIDDEN, 48903 <at> debbugs.gnu.org, maxim.cournoyer@HIDDEN, bug-guix@HIDDEN. Full text available.
Report forwarded to ludo@HIDDEN, 48903 <at> debbugs.gnu.org, maxim.cournoyer@HIDDEN, bug-guix@HIDDEN:
bug#49132; Package guix. Full text available.
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