[New-bugs-announce] [issue21868] Tbuffer in turtle allows negative size

[Lita Cho]

New submission from Lita Cho:

Currently, you can set the undobuffer size to negative numbers. Aka, the Tbuffer can be set to negative.

s = turtle.Screen()
raw = turtle.RawTurtle(s)
raw.setundobuffer(-10)
raw.undobuffer.bufsize == -10 <-- returns True

This should not be possible. Tbuffer should not be allowed to have negative inputs. If the value is less than 0, it should just default to 0 or None. Otherwise, when you call undo, turtle just crashes.

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messages: 221530
nosy: Lita.Cho
priority: normal
severity: normal
status: open
title: Tbuffer in turtle allows negative size

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21868>
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