[issue16177] Typing left parenthesis in IDLE causes intermittent Cocoa Tk crash on OS X

[Tom Goddard]

Tom Goddard  added the comment:

This Mac Tk bug was supposedly fixed in 2016 or 2017.  Details are in the 
following Tk ticket.

http://core.tcl.tk/tk/tktview/c84f660833546b1b84e7

The previous URL to the Tk ticket no longer works.  In case the above URL also 
goes bad, the id number for the Tk ticket is 

c84f660833546b1b84e7fd3aef930c2f17207461

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[issue16177] Typing left parenthesis in IDLE causes intermittent Cocoa Tk crash on OS X

[Terry J. Reedy]

Change by Terry J. Reedy :


--
assignee:  -> terry.reedy
components: +IDLE, macOS
nosy: +ronaldoussoren, terry.reedy

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[issue16177] Typing left parenthesis in IDLE causes intermittent Cocoa Tk crash on OS X

[Ned Deily]

Ned Deily added the comment:

Thanks for the confirmation, Brian.  I certainly would not have thought to ask 
about multiple monitors.

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[issue16177] Typing left parenthesis in IDLE causes intermittent Cocoa Tk crash on OS X

[Brian Keegan]

Brian Keegan added the comment:

I was also using a dual-screen setup: laptop + external display.

On Thu, Oct 9, 2014 at 1:07 AM, Ned Deily  wrote:

>
> Ned Deily added the comment:
>
> Thanks, Tom, nice writeup!  If any of the other people who have seen this
> crash are still around, it would be interesting to know if they also were
> using more than one monitor.
>
> --
>
> ___
> Python tracker 
> 
> ___
>

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[issue16177] Typing left parenthesis in IDLE causes intermittent Cocoa Tk crash on OS X

[Ned Deily]

Ned Deily added the comment:

Thanks, Tom, nice writeup!  If any of the other people who have seen this crash 
are still around, it would be interesting to know if they also were using more 
than one monitor.

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[issue16177] Typing left parenthesis in IDLE causes intermittent Cocoa Tk crash on OS X

[Tom Goddard]

Tom Goddard added the comment:

Ok I reported this as a Mac Tk bug and gave a very simple way to reproduce it.

http://core.tcl.tk/tk/tktview?name=3Dc84f660833

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[issue16177] Typing left parenthesis in IDLE causes intermittent Cocoa Tk crash on OS X

[Ned Deily]

Ned Deily added the comment:

Tom, thanks for the detailed analysis.  It seems pretty clear that this is not 
a Python problem and there's really nothing we can do about it.  It would be 
great if you would be willing to open an issue on the Tcl/Tk project's issue 
tracker so that they are aware of it and perhaps can investigate it now that 
there might be a way to reliably reproduce the crash.  I'm going to close this 
issue under the assumption it is a Tk problem.  If it should prove otherwise, 
feel free to re-open.

http://core.tcl.tk/tcl/reportlist

--
resolution:  -> third party
stage: test needed -> resolved
status: open -> closed

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[issue16177] Typing left parenthesis in IDLE causes intermittent Cocoa Tk crash on OS X

[Tom Goddard]

Tom Goddard added the comment:

More testing shows that this Mac Tk crash with dual displays only happens when 
the second display is partly or entirely above the primary display in the Mac 
display system preferences.  An attempt to show the tooltip on the second 
display above the top of the primary display a crash happens.  Contrary to my 
previous comment it does not appear to depend on whether the secondary display 
is to the right or to the left of the primary display.  Possibly the key factor 
is that the tooltip is being displayed above Mac top of (primary) screen menu 
bar.  It is possible that that is an Apple bug, rather than a Mac Tk bug.

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[issue16177] Typing left parenthesis in IDLE causes intermittent Cocoa Tk crash on OS X

[Tom Goddard]

Tom Goddard added the comment:

I've seen this crash about 50 times in the UCSF Chimera molecular visualization 
package, same traceback, and it is caused when a tooltip is raised, but not 
from IDLE.  The key observation is that it only happens on dual display systems 
where the second display is positioned partly or entirely above or to the left 
of the primary display.  An attempt to raise a tooltip on that second display 
causes a crash.  This seems almost certain to be a Mac Tk bug.  At first I 
thought it was caused by the x,y screen position of the tool tip being 
negative.  But when the second screen is arranged above the primary screen (in 
Mac display system preferences) the y position is which increases from bottom 
to top is something like 2000, not negative.  Currently my hunch is that the 
tooltip popup window was created for the primary display, and trying to 
position it on the secondary display is for some reason an error.  I don't know 
enough about the native Mac NSWindow to say anything definitive.

Hope this helps you to at least consistently reproduce the crash.

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nosy: +goddard

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[issue16177] Typing left parenthesis in IDLE causes intermittent Cocoa Tk crash on OS X

[Ned Deily]

Ned Deily added the comment:

Thanks for the report, Eric.  It confirms that the problem still exists with 
everything current.  I'm sorry you are hitting the crash.  Without being able 
to reliably reproduce the problem, it's difficult to be able to help.  Are 
there any hints you can give about what you were doing leading up to the crash, 
e.g. how many IDLE windows open, how large and where were they placed on the 
desktop, any hidden IDLE windows, how large a file if editing (is the window 
scrolling)?  The only other practical thing I can think of is to try a debug 
build of Python and of Tcl/Tk in the hopes of getting a more precise stack 
trace. (I could supply that.)  I suspect opening a Tk or an Apple incident 
without more to go will not be very productive.

--
components:  -IDLE
nosy: +wordtech
stage:  -> test needed
title: IDLE Crash on Open Parens -> Typing left parenthesis in IDLE causes 
intermittent Cocoa Tk crash on OS X

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