Message 228725 - Python tracker

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This crash behavior is due to an old bug in the OS X Cocoa implementation of Tk.  It has been fixed in the most recent releases of Tk 8.5.x and 8.6.x but, unfortunately, Apple has not yet shipped the fix in any version of the OS X system Tk 8.5 (since OS X 10.6).  If you are building your own Python 3.5, you can install the most recent copy of ActiveTcl 8.5.x or 8.6.x (assuming the license terms are acceptable) or you could build your own Tcl/Tk and then rebuild _tkinter.so.  For more information: https://www.python.org/download/mac/tcltk and
http://sourceforge.net/p/tktoolkit/bugs/2722/