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Issue #21868: Prevent turtle crash due to invalid undo buffer size.

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This commit is contained in:
Raymond Hettinger 2014-07-20 21:30:32 -07:00
parent 01963e6ae9
commit 854e76effa
2 changed files with 3 additions and 1 deletions
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2
Lib/turtle.py
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@ -2594,7 +2594,7 @@ class RawTurtle(TPen, TNavigator):
Example (for a Turtle instance named turtle):
>>> turtle.setundobuffer(42)
"""
if size is None:
if size is None or size <= 0:
self.undobuffer = None
else:
self.undobuffer = Tbuffer(size)