Terry J. Reedy added the comment:
If you start IDLE from the console with 'python -m idlelib' you should see a
TclError message when pasting. This is a known limitation of tcl/tk. Printing
gives a traceback in IDLE's shell.
>>> print('\U00020BB7')
Traceback (most recent call last):
File "<pyshell#26>", line 1, in <module>
print('\U00020BB7')
File "C:\Programs\Python35\lib\idlelib\PyShell.py", line 1344, in write
return self.shell.write(s, self.tags)
UnicodeEncodeError: 'UCS-2' codec can't encode character '\U00020bb7' in
position 0: Non-BMP character not supported in Tk
----------
nosy: +terry.reedy
resolution: -> duplicate
stage: -> resolved
status: open -> closed
superseder: -> IDLE crashes when pasting non-BMP unicode char on Py3
title: IDEL for Python 3.5.1 for x64 Windows exits when pasted a string with
non-BMP characters -> IDLE for Python 3.5.1 for x64 Windows exits when pasted a
string with non-BMP characters
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue26420>
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