From f60784228a05c21aabc0a97b62fb158ce479525c Mon Sep 17 00:00:00 2001
From: Ricardo Wurmus <ricardo.wurmus@mdc-berlin.de>
Date: Tue, 7 Aug 2018 18:00:16 +0200
Subject: import: cabal, hackage: Avoid error when custom setup section is
 missing.

Fixes <https://debbugs.gnu.org/32387>.

* guix/import/cabal.scm (eval-cabal): Avoid mis-match when the custom-setup
section cannot be created.
* guix/import/hackage.scm (cabal-custom-setup-dependencies->names): Do not
crash when cabal-package-custom-setup returns #F.
---
 guix/import/hackage.scm | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'guix/import/hackage.scm')

diff --git a/guix/import/hackage.scm b/guix/import/hackage.scm
index 6f80d84b70..3b138f8c98 100644
--- a/guix/import/hackage.scm
+++ b/guix/import/hackage.scm
@@ -2,6 +2,7 @@
 ;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch>
 ;;; Copyright © 2016 Eric Bavier <bavier@member.fsf.org>
 ;;; Copyright © 2016 Nils Gillmann <ng0@n0.is>
+;;; Copyright © 2018 Ricardo Wurmus <rekado@elephly.net>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -178,8 +179,9 @@ object."
 (define (cabal-custom-setup-dependencies->names cabal)
   "Return the list of custom-setup dependencies from the CABAL package
 object."
-  (let* ((custom-setup-dependencies (and=> (cabal-package-custom-setup cabal)
-                                           cabal-custom-setup-dependencies)))
+  (let* ((custom-setup-dependencies (or (and=> (cabal-package-custom-setup cabal)
+                                               cabal-custom-setup-dependencies)
+                                        '())))
     (map cabal-dependency-name custom-setup-dependencies)))
 
 (define (filter-dependencies dependencies own-name)
-- 
cgit v1.2.3