diff -r 178d4ffe1249 -r 9f618a0c2880 Lib/traceback.py
--- a/Lib/traceback.py	Sun Oct 12 16:13:38 2014 +0200
+++ b/Lib/traceback.py	Sun Oct 12 16:31:14 2014 +0000
@@ -3,6 +3,7 @@
 import linecache
 import sys
 import operator
+import types
 
 __all__ = ['extract_stack', 'extract_tb', 'format_exception',
            'format_exception_only', 'format_list', 'format_stack',
@@ -51,8 +52,14 @@
 # - Next item (same type as curr)
 # In practice, curr is either a traceback or a frame.
 def _extract_tb_or_stack_iter(curr, limit, extractor):
+    # Distinguish frames from tracebacks (need to import types)
     if limit is None:
         limit = getattr(sys, 'tracebacklimit', None)
+    elif limit < 0 and isinstance(curr, types.TracebackType):
+        seq = list(_extract_tb_or_stack_iter(curr, None, extractor))
+        yield from seq[limit:]
+    else:
+        pass
 
     n = 0
     while curr is not None and (limit is None or n < limit):