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From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
To: 72061 <at> debbugs.gnu.org
Subject: Re: bug#72061: Discrepancy when running =?utf-8?B?4oCYZ3VpeCBw?=
=?utf-8?B?dWxs4oCZ?= from different machines
In-Reply-To: <877cds0z4l.fsf@HIDDEN> ("Ludovic =?utf-8?Q?Court=C3=A8s=22'?=
=?utf-8?Q?s?= message of "Thu, 11 Jul 2024 16:41:46 +0200")
References: <87bk34113k.fsf@HIDDEN> <877cds0z4l.fsf@HIDDEN>
Date: Thu, 11 Jul 2024 17:33:24 +0200
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Ludovic Court=C3=A8s <ludo@HIDDEN> skribis:
> The =E2=80=9Cright=E2=80=9D one:
>
> $ setarch -R guix time-machine -q --commit=3D0ff72d105 -- build avahi -d
> /gnu/store/fy39r2y8dg2ycdzvnbqyfd1kpandnpxb-avahi-0.8.drv
>
>
> The =E2=80=9Cwrong=E2=80=9D one:
>
> $ setarch -R guix time-machine -q --commit=3D0ff72d105 -- build avahi -d
> /gnu/store/vhj8f01bwddshnc75ar5z62ndcij4pgy-avahi-0.8.drv
Turns out the =E2=80=9Cright=E2=80=9D one uses =E2=80=98builtin:git-downloa=
d=E2=80=99, the =E2=80=9Cwrong=E2=80=9D one
doesn=E2=80=99t:
--8<---------------cut here---------------start------------->8---
$ guix time-machine -q --commit=3D0ff72d105 -- repl=20
GNU Guile 3.0.9
Copyright (C) 1995-2023 Free Software Foundation, Inc.
Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type `,show c' for details.
Enter `,help' for help.
scheme@(guix-user)> ,use(guix)
scheme@(guix-user)> (define set-builders! (record-modifier (@@ (guix store)=
<store-connection>) 'built-in-builders))
;;; <stdin>:2:0: warning: possibly unused local top-level variable `set-bui=
lders!'
scheme@(guix-user)> (define s (open-connection))
;;; <stdin>:3:0: warning: possibly unused local top-level variable `s'
scheme@(guix-user)> (set-builders! s (delay '("download")))
$1 =3D #<promise #<procedure 19cdf418 at <unknown port>:4:17 ()>>
scheme@(guix-user)> ,use(gnu packages avahi)
scheme@(guix-user)> ,run-in-store (lower-object avahi)
error: #{ %make-platform-procedure/abi-check}#: unbound variable
hint: Did you forget a `use-modules' form?
$2 =3D #<derivation /gnu/store/fy39r2y8dg2ycdzvnbqyfd1kpandnpxb-avahi-0.8.d=
rv =3D> /gnu/store/4gzpnfm6pw7cwwgrmswrsibbzdxz1j1w-avahi-0.8 7fad68382af0>
scheme@(guix-user)> (run-with-store s (lower-object avahi))
$3 =3D #<derivation /gnu/store/vhj8f01bwddshnc75ar5z62ndcij4pgy-avahi-0.8.d=
rv =3D> /gnu/store/64f62b0klc3mrncad6x79cwfd3smmf8z-avahi-0.8 7fad68d15230>
--8<---------------cut here---------------end--------------->8---
QED.
Presumably whether =E2=80=98builtin:git-download=E2=80=99 is used changes t=
he DAG
traversal order, which could explain this discrepancy.
It does mean that all the users running an old guix-daemon find
themselves having no substitutes for =E2=80=98guix pull=E2=80=99. Ouch.
Ludo=E2=80=99.
bug-guix@HIDDEN:bug#72061; Package guix.
Full text available.Ludovic Courtès <ludo@HIDDEN>
to control <at> debbugs.gnu.org.
Full text available.
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From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
To: 72061 <at> debbugs.gnu.org
Subject: Re: bug#72061: Discrepancy when running =?utf-8?B?4oCYZ3VpeCBw?=
=?utf-8?B?dWxs4oCZ?= from different machines
In-Reply-To: <87bk34113k.fsf@HIDDEN> ("Ludovic =?utf-8?Q?Court=C3=A8s=22?=
=?utf-8?Q?'s?= message of "Thu, 11 Jul 2024 15:59:11 +0200")
References: <87bk34113k.fsf@HIDDEN>
Date: Thu, 11 Jul 2024 16:41:46 +0200
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Ludovic Court=C3=A8s <ludovic.courtes@HIDDEN> skribis:
> Digging into the derivation graph reveals the difference below in the
> derivation that builds the grafted avahi:
>
> diff -ubBr --show-c-function --label \#\<buffer\ 32kpijl743qn7v337i19dd1h=
ph1rd6x7-avahi-0.8-builder\> --label \#\<buffer\ z1kanbslzb2lrr1hj922a50zkx=
l9jz28-avahi-0.8-builder\> /tmp/buffer-content-tBGXyv /tmp/buffer-content-X=
M8vEv
> --- #<buffer 32kpijl743qn7v337i19dd1hph1rd6x7-avahi-0.8-builder>
> +++ #<buffer z1kanbslzb2lrr1hj922a50zkxl9jz28-avahi-0.8-builder>
> @@ -23,11 +23,11 @@
> (("/gnu/store/ill8bkp6wshj15nc4fxk4wgln15rgyi6-libevent-2.1.12" . "/g=
nu/store/s6jj1mrdhi2l2860zd9n609qfhlgjc1m-libevent-2.1.12")
> ("/gnu/store/930nwsiysdvy2x5zv1sf6v7ym75z8ayk-gcc-11.3.0-lib" . "/gn=
u/store/6ncav55lbk5kqvwwflrzcr41hp5jbq0c-gcc-11.3.0-lib")
> ("/gnu/store/gsjczqir1wbz8p770zndrpw4rnppmxi3-glibc-2.35" . "/gnu/st=
ore/ln6hxqjvz6m9gdd9s97pivlqck7hzs99-glibc-2.35")
> + ("/gnu/store/36my0g0j72b3vbz0gj1l8f0lmmgfkv3w-glib-2.72.3" . "/gnu/s=
tore/m26kdkgr4c09wc0djn2pgcz9jl7j2rw1-glib-2.72.3")
> ("/gnu/store/2w976k6g70gkfih9wwhalqsni209vcqz-gdbm-1.23" . "/gnu/sto=
re/z655ilai81pbzbm35zwfqc64ha7wl37k-gdbm-1.23")
> ("/gnu/store/x2a1qx3syync9q4ka1gh8g0svrcq86k6-libdaemon-0.14" . "/gn=
u/store/br5achyfqqgw6yzx82s5v9h7llcf7q4q-libdaemon-0.14")
> ("/gnu/store/h4kvisn532l7ndqniqnj30yd26vksasq-dbus-1.14.0" . "/gnu/s=
tore/hjc4rdifbl890j03xy2gsa7y2sqcg0mi-dbus-1.14.0")
> ("/gnu/store/fw1wywd34vh33l4dq182ds5d7jdz45j5-expat-2.5.0" . "/gnu/s=
tore/94rdaacvsqf05zhw88w92y8bkvgxdfpl-expat-2.5.0")
> - ("/gnu/store/36my0g0j72b3vbz0gj1l8f0lmmgfkv3w-glib-2.72.3" . "/gnu/s=
tore/m26kdkgr4c09wc0djn2pgcz9jl7j2rw1-glib-2.72.3")
> ("/gnu/store/sjy64dvx18yc5p29zywmg01k3g53p643-libcap-2.64" . "/gnu/s=
tore/ba5ri728kpa5fv314fav2id0nc3l0hsk-libcap-2.64")
> ("/gnu/store/9vw5slrffp27rzy2i2plnw7xfqjyk7m4-bash-minimal-5.1.16" .=
"/gnu/store/5mzqf6fz9bz30ybgx7jrqw424qbg9rbk-bash-minimal-5.1.16")))
> (map
It can be reproduced like so by computing the grafting derivation of
avahi.
The =E2=80=9Cright=E2=80=9D one:
--8<---------------cut here---------------start------------->8---
$ setarch -R guix time-machine -q --commit=3D0ff72d105 -- build avahi -d
/gnu/store/fy39r2y8dg2ycdzvnbqyfd1kpandnpxb-avahi-0.8.drv
--8<---------------cut here---------------end--------------->8---
The =E2=80=9Cwrong=E2=80=9D one:
--8<---------------cut here---------------start------------->8---
$ setarch -R guix time-machine -q --commit=3D0ff72d105 -- build avahi -d
/gnu/store/vhj8f01bwddshnc75ar5z62ndcij4pgy-avahi-0.8.drv
--8<---------------cut here---------------end--------------->8---
Ludo=E2=80=99.
bug-guix@HIDDEN:bug#72061; Package guix.
Full text available.
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To: bug-guix@HIDDEN
Subject: Discrepancy when running =?utf-8?B?4oCYZ3VpeCBwdWxs4oCZ?= from
different machines
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--=-=-=
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
While running:
guix pull -q --commit=3D0ff72d105
on two different machines, we found that the resulting derivation would
be different. The =E2=80=9Cright one=E2=80=9D (same as on ci.guix is):
--8<---------------cut here---------------start------------->8---
$ readlink $(readlink my.0ff72d105)
/gnu/store/1g1zhh3864xzh0csqrzf5c1qkbd3q5pp-profile
$ guix gc --derivers $(readlink -f my.0ff72d105)
/gnu/store/b6zvsh8z7fmx5bpw21wqhnl82kfag5s1-profile.drv
$ guix gc -R $(guix gc --derivers $(readlink -f my.0ff72d105)) |grep guix-0=
ff72d105
/gnu/store/sarff52m9zavyyadllixk9brjqfacn57-guix-0ff72d105-modules-builder
/gnu/store/ys9rcn7d9xp4d2wwcy6i21gm6rmviv31-guix-0ff72d105-builder
/gnu/store/6l3xi9lcib99lpdq6z7x5bahm4ppxw45-guix-0ff72d105-modules.drv
/gnu/store/w3h8kvag0dbw9y6qq35r3fb87b1xpykd-guix-0ff72d105.drv
--8<---------------cut here---------------end--------------->8---
On the other machine, where substitutes would consequently be
unavailable, we=E2=80=99d get:
--8<---------------cut here---------------start------------->8---
$ readlink fernando.0ff72d105.drv
/gnu/store/hl1di1dq6mcd7jl0phk5bi12yqcc9dif-guix-0ff72d105.drv
$ guix gc -R /gnu/store/hl1di1dq6mcd7jl0phk5bi12yqcc9dif-guix-0ff72d105.drv=
|grep guix-0ff72d105
/gnu/store/p04znrg5frzj6gpiafpx7cgr4n7jly5s-guix-0ff72d105-modules-builder
/gnu/store/sc7y5i9pi5w2cpba0xmk7pzqckn642bp-guix-0ff72d105-modules.drv
/gnu/store/p4bh6x0r8qy9lpg77p52cjzxjzhp0mwr-guix-0ff72d105-builder
/gnu/store/hl1di1dq6mcd7jl0phk5bi12yqcc9dif-guix-0ff72d105.drv
--8<---------------cut here---------------end--------------->8---
Digging into the derivation graph reveals the difference below in the
derivation that builds the grafted avahi:
--=-=-=
Content-Type: text/x-patch
Content-Disposition: inline
diff -ubBr --show-c-function --label \#\<buffer\ 32kpijl743qn7v337i19dd1hph1rd6x7-avahi-0.8-builder\> --label \#\<buffer\ z1kanbslzb2lrr1hj922a50zkxl9jz28-avahi-0.8-builder\> /tmp/buffer-content-tBGXyv /tmp/buffer-content-XM8vEv
--- #<buffer 32kpijl743qn7v337i19dd1hph1rd6x7-avahi-0.8-builder>
+++ #<buffer z1kanbslzb2lrr1hj922a50zkxl9jz28-avahi-0.8-builder>
@@ -23,11 +23,11 @@
(("/gnu/store/ill8bkp6wshj15nc4fxk4wgln15rgyi6-libevent-2.1.12" . "/gnu/store/s6jj1mrdhi2l2860zd9n609qfhlgjc1m-libevent-2.1.12")
("/gnu/store/930nwsiysdvy2x5zv1sf6v7ym75z8ayk-gcc-11.3.0-lib" . "/gnu/store/6ncav55lbk5kqvwwflrzcr41hp5jbq0c-gcc-11.3.0-lib")
("/gnu/store/gsjczqir1wbz8p770zndrpw4rnppmxi3-glibc-2.35" . "/gnu/store/ln6hxqjvz6m9gdd9s97pivlqck7hzs99-glibc-2.35")
+ ("/gnu/store/36my0g0j72b3vbz0gj1l8f0lmmgfkv3w-glib-2.72.3" . "/gnu/store/m26kdkgr4c09wc0djn2pgcz9jl7j2rw1-glib-2.72.3")
("/gnu/store/2w976k6g70gkfih9wwhalqsni209vcqz-gdbm-1.23" . "/gnu/store/z655ilai81pbzbm35zwfqc64ha7wl37k-gdbm-1.23")
("/gnu/store/x2a1qx3syync9q4ka1gh8g0svrcq86k6-libdaemon-0.14" . "/gnu/store/br5achyfqqgw6yzx82s5v9h7llcf7q4q-libdaemon-0.14")
("/gnu/store/h4kvisn532l7ndqniqnj30yd26vksasq-dbus-1.14.0" . "/gnu/store/hjc4rdifbl890j03xy2gsa7y2sqcg0mi-dbus-1.14.0")
("/gnu/store/fw1wywd34vh33l4dq182ds5d7jdz45j5-expat-2.5.0" . "/gnu/store/94rdaacvsqf05zhw88w92y8bkvgxdfpl-expat-2.5.0")
- ("/gnu/store/36my0g0j72b3vbz0gj1l8f0lmmgfkv3w-glib-2.72.3" . "/gnu/store/m26kdkgr4c09wc0djn2pgcz9jl7j2rw1-glib-2.72.3")
("/gnu/store/sjy64dvx18yc5p29zywmg01k3g53p643-libcap-2.64" . "/gnu/store/ba5ri728kpa5fv314fav2id0nc3l0hsk-libcap-2.64")
("/gnu/store/9vw5slrffp27rzy2i2plnw7xfqjyk7m4-bash-minimal-5.1.16" . "/gnu/store/5mzqf6fz9bz30ybgx7jrqw424qbg9rbk-bash-minimal-5.1.16")))
(map
--=-=-=
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
That is, the ordering of grafts in the =E2=80=98mapping=E2=80=99 variables =
created by
=E2=80=98graft-derivation/shallow=E2=80=99 would be different.
This would suggest something=E2=80=99s happening in a non-deterministic or
stateful fashion.
To be continued=E2=80=A6
Ludo=E2=80=99.
--=-=-=--
Ludovic Courtès <ludovic.courtes@HIDDEN>:bug-guix@HIDDEN.
Full text available.bug-guix@HIDDEN:bug#72061; Package guix.
Full text available.
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997 nCipher Corporation Ltd,
1994-97 Ian Jackson.