From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
Subject: bug#19630: error message when referencing non-existing output not
	helpful
Date: Sat, 24 Jan 2015 23:01:07 +0100
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To: Ricardo Wurmus <ricardo.wurmus@mdc-berlin.de>
Cc: 19630-done@debbugs.gnu.org

Commit f304c9c fixes that.  Now the result is something like this:

--8<---------------cut here---------------start------------->8---
$ ./pre-inst-env guix build abiword -n
guix build: error: reference to invalid output 'binfds' of derivation '/gnu=
/store/7lxd5yri8s4vkailk1jg5bxiqrshblj1-glib-2.42.1.drv'
--8<---------------cut here---------------end--------------->8---

It doesn=E2=80=99t say the context in which that invalid reference occurred=
, but
it=E2=80=99s already much better.

Note that at the lowest level it=E2=80=99s possible to create a derivation =
that
refers to a non-existent output of some other derivation.  The problem
will go unnoticed until the =E2=80=98build-derivations=E2=80=99 RPC is call=
ed.

Thanks,
Ludo=E2=80=99.