Peter Haight discovered that this code uses a mutable default for cnf
and then (under certain circumstances) can clobber the default!
He also submitted this patch as PR#82.
diff --git a/Lib/lib-tk/ScrolledText.py b/Lib/lib-tk/ScrolledText.py
index f1c2bb0..05b728a 100644
--- a/Lib/lib-tk/ScrolledText.py
+++ b/Lib/lib-tk/ScrolledText.py
@@ -14,7 +14,9 @@
from Tkinter import _cnfmerge
class ScrolledText(Text):
- def __init__(self, master=None, cnf={}, **kw):
+ def __init__(self, master=None, cnf=None, **kw):
+ if cnf is None:
+ cnf = {}
if kw:
cnf = _cnfmerge((cnf, kw))
fcnf = {}