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On Windows 10, 64 bit, "Python 3.6.1 (v3.6.1:69c0db5, Mar 21 2017, 18:41:36) [MSC v.1900 64 bit (AMD64)] on win32" crashes if 𐌈𐌖 is pasted into the interpreter window, closing the window immediately.
Also 𐌆𐌀𐌋 crashes it too, suggesting the bug might be in text processing of Etruscan runes.

Are you using cmd.exe, PowerShell or IDLE?

IDLE
On Wed, Jun 6, 2018, 11:56 STINNER Victor <report@bugs.python.org> wrote:
>
> STINNER Victor <vstinner@redhat.com> added the comment:
>
> Are you using cmd.exe, PowerShell or IDLE?
>
> ----------
>
> _______________________________________
> Python tracker <report@bugs.python.org>
> <https://bugs.python.org/issue33785>
> _______________________________________
>

I suspect this is the old issue of Tcl/Tk's lack of support for Unicode characters outside the BMP. If I'm correct, there's nothing we can do about it.

Would running it in Powershell avoid the issue?
What is the BMP, by the way?

For clarity, the first is '\U00010308\U00010316' and the second is '\U00010306\U00010300\U0001030B'.
The BMP is the Basic Multilingual Plane, which covers the codepoints in the range U+0000 to U+FFFF. Some software has a problem dealing with codepoints outside the BMP.

Depending on PowerShell's support for Unicode (I'm not familiar with it :)), yes; running python from PowerShell would probably be fine in this case.
The BMP: https://en.wikipedia.org/wiki/Plane_(Unicode)#Basic_Multilingual_Plane 

It doesn't crash in Powershell, only shows up as the ? in a box character
The issue must be with IDLE, most likely the BMP lack of support

This is a duplicate of the remaining part of #13153. The error message displayed in a console used to start IDLE is the same, ending with "UnicodeDecodeError: 'utf-8' codec can't decode byte 0xed in position 0: invalid continuation byte" In the previous issue, Ezio explained the message and Serhiy submitted patches at yet untested. So I am closing this.