Should work for cpython and pypy now (if the latter is fixed)tproxy

1 files changed, 7 insertions, 9 deletions

diff --git a/jinja2/debug.py b/jinja2/debug.py
index 80ee2e7..2f46c22 100644
--- a/jinja2/debug.py
+++ b/jinja2/debug.py
@@ -39,17 +39,15 @@ class TracebackFrameProxy(object):
         self.tb = tb
         self._tb_next = None
 
-    def _set_tb_next(self, next):
+    @property
+    def tb_next(self):
+        return self._tb_next
+
+    def set_next(self, next):
         if tb_set_next is not None:
             tb_set_next(self.tb, next and next.tb or None)
         self._tb_next = next
 
-    def _get_tb_next(self):
-        return self._tb_next
-
-    tb_next = property(_get_tb_next, _set_tb_next)
-    del _get_tb_next, _set_tb_next
-
     @property
     def is_jinja_frame(self):
         return '__jinja_template__' in self.tb.tb_frame.f_globals
@@ -80,9 +78,9 @@ class ProcessedTraceback(object):
         prev_tb = None
         for tb in self.frames:
             if prev_tb is not None:
-                prev_tb._tb_next = tb
+                prev_tb.set_next(tb)
             prev_tb = tb
-        prev_tb._tb_next = None
+        prev_tb.set_next(None)
 
     def render_as_text(self, limit=None):
         """Return a string with the traceback."""