From 9dcb47dc556ed792ca4c16ffb3f0c049bd55c971 Mon Sep 17 00:00:00 2001
From: Daniel Hahler <github@thequod.de>
Date: Thu, 30 Aug 2018 21:15:31 +0200
Subject: [PATCH] Fix utils.reraise for exceptions without args (#210)

This is the case for e.g. `bdb.BdbQuit`.
---
 configurations/utils.py |  2 +-
 tests/test_main.py      | 14 ++++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/configurations/utils.py b/configurations/utils.py
index b74b32a..d9da11b 100644
--- a/configurations/utils.py
+++ b/configurations/utils.py
@@ -62,7 +62,7 @@ def reraise(exc, prefix=None, suffix=None):
         suffix = ''
     elif not (suffix.startswith('(') and suffix.endswith(')')):
         suffix = '(' + suffix + ')'
-    exc.args = ('{0} {1} {2}'.format(prefix, exc.args[0], suffix),) + args[1:]
+    exc.args = ('{0} {1} {2}'.format(prefix, args[0], suffix),) + args[1:]
     raise
 
 
diff --git a/tests/test_main.py b/tests/test_main.py
index ac3e09b..fe0e6ce 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -118,3 +118,17 @@ class MainTests(TestCase):
         self.assertIn('setup_2', stdout)
         self.assertIn('setup_done', stdout)
         self.assertEqual(proc.returncode, 0)
+
+    def test_utils_reraise(self):
+        from configurations.utils import reraise
+
+        class CustomException(Exception):
+            pass
+
+        with self.assertRaises(CustomException) as cm:
+            try:
+                raise CustomException
+            except Exception as exc:
+                reraise(exc, "Couldn't setup configuration", None)
+
+        self.assertEqual(cm.exception.args, ("Couldn't setup configuration:   ",))