From 7e75a6739bf02c39baf8340e31e590c2c7c5fd16 Mon Sep 17 00:00:00 2001
From: Ludovic Courtès <ludo@gnu.org>
Date: Mon, 2 Mar 2015 16:26:13 +0100
Subject: gexp: Make sure 'gexp-outputs' removes duplicate outputs.

Fixes a regression introduced in f9efe56.

* guix/gexp.scm (gexp-outputs): Add call to 'delete-duplicates'.
* tests/gexp.scm ("output list, combined gexps, duplicate output"): New
  test.
---
 guix/gexp.scm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'guix')

diff --git a/guix/gexp.scm b/guix/gexp.scm
index 1f64cf75ae..1e26342101 100644
--- a/guix/gexp.scm
+++ b/guix/gexp.scm
@@ -319,7 +319,8 @@ references."
       (_
        result)))
 
-  (add-reference-output (gexp-references exp) '()))
+  (delete-duplicates
+   (add-reference-output (gexp-references exp) '())))
 
 (define* (gexp->sexp exp #:key
                      (system (%current-system))
-- 
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