[issue7074] Turtle module crashes python

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

This is not a duplicate because this issue is about the stdlib turtle module doing something wrong and needing to be fixed. Also, this issue does not involve threads, at least none that I starting.

"It is not safe to call graphic primitives in event callbacks."

This is a confusing statement. The tutorial at
http://www.tkdocs.com/tutorial/canvas.html
by an experienced tk developer (19 years) includes this:

def addLine(event):
    global lastx, lasty
    canvas.create_line((lastx, lasty, event.x, event.y))
    lastx, lasty = event.x, event.y

Is canvas.create_line a primitive or not?

At the very least, unless I missed something, some change to turtle doc is needed.

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resolution: duplicate -> 
status: closed -> open

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue7074>
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