[debbugs-tracker] bug#37506: closed ('guix pull --branch=master' on core-updates (Guile 2.2.6) fails)

[GNU bug Tracking System]

Your message dated Wed, 02 Oct 2019 11:40:58 +0200
with message-id <address@hidden>
and subject line Re: bug#37506: [core-updates] Inferiors cannot reference 
master branch
has caused the debbugs.gnu.org bug report #37506,
regarding 'guix pull --branch=master' on core-updates (Guile 2.2.6) fails
to be marked as done.

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37506: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=37506
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--- Begin Message --- Subject: [core-updates] Inferiors cannot reference master branch Date: Tue, 24 Sep 2019 19:00:23 +0200 User-agent: Notmuch/0.29.1 (https://notmuchmail.org) Emacs/26.2 (x86_64-pc-linux-gnu)

Hello,

On the 'core-updates' branch, if you try to reference the 'master'
branch in an inferior, your system will fail to build like so:

Backtrace:
          11 (primitive-load "/gnu/store/m5wq1irm2gb7r4k72qmzf1hi426?")
In ice-9/eval.scm:
    619:8 10 (_ #f)
In srfi/srfi-1.scm:
   466:18  9 (fold #<procedure 7ffff4f17ec0 at ice-9/eval.scm:336:1?> ?)
   466:18  8 (fold #<procedure 7ffff445c500 at ice-9/eval.scm:336:1?> ?)
   466:18  7 (fold #<procedure 7fffeff86ea0 at ice-9/eval.scm:336:1?> ?)
In ice-9/eval.scm:
    619:8  6 (_ #(#(#<directory (guix build utils) 7ffff5c9e500>) # ?))
In ice-9/boot-9.scm:
   2312:4  5 (save-module-excursion _)
In unknown file:
           4 (primitive-load "./guix/build/syscalls.scm")
In ice-9/eval.scm:
    619:8  3 (_ #f)
In ice-9/boot-9.scm:
  2071:24  2 (call-with-deferred-observers #<procedure 7fffeecd2480 ?>)
   260:13  1 (for-each #<procedure 7fffeecd2340 at ice-9/boot-9.scm?> ?)
In unknown file:
           0 (scm-error misc-error #f "~A ~S" ("re-exporting loc?" ?) ?)

ERROR: In procedure scm-error:
re-exporting local variable: AT_SYMLINK_NOFOLLOW
builder for 
`/gnu/store/3a5d7ykx6wpyw9z1i01w69cafhrzjc21-module-import-compiled.drv' failed 
with exit code 1
cannot build derivation 
`/gnu/store/l3kml1yk7ma9d1bybsjvv5iw1khy6b89-compute-guix-derivation.drv': 1 
dependencies couldn't be built
guix system: error: exception thrown: #<condition &store-protocol-error 
[message: "build of 
`/gnu/store/l3kml1yk7ma9d1bybsjvv5iw1khy6b89-compute-guix-derivation.drv' 
failed" status: 100] 7f97fba2e540

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--- End Message ---

> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#37506: [core-updates] Inferiors cannot reference master branch
>
>
>
>
> Date: 
>
> Wed, 02 Oct 2019 11:40:58 +0200
>
>
>
>
> User-agent: 
>
> Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux)
>
>
>
>
> Hi,
>
> Ludovic Courtès <address@hidden> skribis:
>
> >> Oh I see.  This is fixed by cherry-picking
> >> 96783ed6275cd2818ff56916274e6e4582f1dc9b from ‘core-updates’ into
> >> ‘master’.  Will push shortly.
> >
> > On second thought, that doesn’t solve the problem for revisions on the
> > current ‘master’ branch between and
> > 456c7ade095cce96f47389c37a4fe3b0390047fd and
> > 7089f98ef1c274f1607ec314f3a16bd3c3ac89a4.  For any commit in that range,
> > ‘guix pull --commit=COMMIT’ will now always fail with:
>
> [...]
>
> > ERROR: In procedure scm-error:
> > re-exporting local variable: AT_SYMLINK_NOFOLLOW
> >
> > It’s a case where code isn’t “forward-compatible”, and it’s code needed
> > to build the “compute-guix-derivation” trampoline.  Bummer.
> >
> > We could hack something to work around it.  For example, we could add to
> > ‘compiled-modules’ a magic parameter that would tell it to undefine
> > AT_SYMLINK_NOFOLLOW & co., or we could build the trampoline with 2.2.4.
>
> I added a “quirk” for that in 37c0d4580e464a5915ea34109f78898325aae2c4.
>
> I suppose we’ll accumulate quirks like this over time here.  Normally
> they should be quite rare because the code used to build the trampoline
> targets the common denominator of all Guile and Guix revisions, but
> we’ll see.
>
> Ludo’.
>
>
> --- End Message ---