bb.exceptions: handle tb entries without context

Signed-off-by: Chris Larson <chris_larson@mentor.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/lib/bb/exceptions.py b/lib/bb/exceptions.py
index e134ae136..86621d24b 100644
--- a/lib/bb/exceptions.py
+++ b/lib/bb/exceptions.py
@@ -8,10 +8,13 @@ from collections import namedtuple
 class TracebackEntry(namedtuple.abc):
     """Pickleable representation of a traceback entry"""
     _fields = 'filename lineno function args code_context index'
-    _header = '  File "{0.filename}", line {0.lineno}, in {0.function}{0.args}:\n'
+    _header = '  File "{0.filename}", line {0.lineno}, in {0.function}{0.args}'
 
     def format(self, formatter=None):
-        formatted = [self._header.format(self)]
+        if not self.code_context:
+            return self._header.format(self) + '\n'
+
+        formatted = [self._header.format(self) + ':\n']
 
         for lineindex, line in enumerate(self.code_context):
             if formatter: