From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
Subject: bug#17083: =?UTF-8?Q?=E2=80=98union-build=E2=80=99?= does not handle
	collisions between a leaf and a sub-tree
Date: Wed, 02 Apr 2014 23:43:43 +0200
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ludo@gnu.org (Ludovic Court=C3=A8s) skribis:

> Mark H Weaver <mhw@netris.org> skribis:
>
>> On the Loongson 3A machine, I finished building all the packages from
>> core-updates that I use in my profile, and then tried installing them.
>> I got this:
>>
>> In /gnu/store/9sqx55rgygyrcyg350cfqwy8wqb4fr69-module-import/guix/build/=
union.scm:
>>  226: 1 [loop # #]
>> In unknown file:
>>    ?: 0 [mkdir "/gnu/store/c30bsax58scw5qwcnbma16k6z88s1lh3-profile/./in=
clude" ...]
>>
>> ERROR: In procedure mkdir:
>> ERROR: In procedure mkdir: File exists
>> builder for `/gnu/store/17w6kggffh79drmmrdnxy1yhgr6p2in5-profile.drv' fa=
iled with exit code 1
>>
>> The problem turns out to be that 'libffi' makes 'include' a symlink to
>> 'lib/libffi-3.0.13/include', and union.scm cannot cope with conflicts
>> between a directory and a symlink.
>
> Ouch, good catch.

This is fixed with the new union.scm (commit 1212999.)

> I=E2=80=99ve come up with a test that reproduces it:

This test was actually bogus, so I committed a correct one (commit
a53a9ae.)

Thanks!

Ludo=E2=80=99.