Make the error messages somewhat more robust when e.args is empty

2 files changed, 9 insertions, 1 deletions

diff --git a/docs/index.txt b/docs/index.txt
index 7ef2598..ef2da2f 100644
--- a/docs/index.txt
+++ b/docs/index.txt
@@ -421,6 +421,11 @@ Still To Do
 News
 ====
 
+svn trunk
+---------
+
+* Make error message annotation slightly more robust
+
 0.2
 ---
 
diff --git a/tempita/__init__.py b/tempita/__init__.py
index ee8a9a4..0ddb670 100644
--- a/tempita/__init__.py
+++ b/tempita/__init__.py
@@ -238,7 +238,10 @@ class Template(object):
         except:
             exc_info = sys.exc_info()
             e = exc_info[1]
-            e.args = (self._add_line_info(e.args[0], pos),)
+            if e.args:
+                e.args = (self._add_line_info(e.args[0], pos),)
+            else:
+                e.args = (self._add_line_info(None, pos),)
             raise exc_info[0], e, exc_info[2]
 
     def _repr(self, value, pos):