[PATCH] build: container: Fix call-with-clean-exit.

[David Thompson]

An oversight on my part that I noticed while doing 'guix environment
--container' testing.

>From dc72ee831d6c6b93cf404a7fd1abc4b8fb27b7f2 Mon Sep 17 00:00:00 2001
From: David Thompson <address@hidden>
Date: Fri, 9 Oct 2015 12:33:40 -0400
Subject: [PATCH] build: container: Fix call-with-clean-exit.

Before, call-with-clean-exit would *always* return an exit code of 1.

* gnu/build/linux-container.scm (call-with-clean-exit): Exit with status
  code of 0 if thunk does not throw an exception.
* tests/containers.scm: Add test.
---
 gnu/build/linux-container.scm | 4 +++-
 tests/containers.scm          | 4 ++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/gnu/build/linux-container.scm b/gnu/build/linux-container.scm
index 95220d0..e911494 100644
--- a/gnu/build/linux-container.scm
+++ b/gnu/build/linux-container.scm
@@ -36,7 +36,9 @@
   "Apply THUNK, but exit with a status code of 1 if it fails."
   (dynamic-wind
     (const #t)
-    thunk
+    (lambda ()
+      (thunk)
+      (primitive-exit 0))
     (lambda ()
       (primitive-exit 1))))
 
diff --git a/tests/containers.scm b/tests/containers.scm
index 4783f8e..0ba8149 100644
--- a/tests/containers.scm
+++ b/tests/containers.scm
@@ -34,6 +34,10 @@
 
 (test-begin "containers")
 
+(test-assert "call-with-container, exit with 0 when there is no error"
+  (zero?
+   (call-with-container '() (const #t) #:namespaces '(user))))
+
 (test-assert "call-with-container, user namespace"
   (zero?
    (call-with-container '()
-- 
2.5.0

-- 
David Thompson
GPG Key: 0FF1D807