royf added the comment:
I started having a similar issue after updating to macOS Mojave 10.14.6.
I'm not using idle, but the following minimal code has a similar issue:
```python
import tkinter as tk
w = tk.Tk()
w.mainloop()
```
The crash happens on `mainloop`.
This worked for me on
New submission from royf :
1. Create a file containing this line:
'\xdk'
2. Open the file for editing in IDLE 2.6.4. Banner:
Python 2.6.4 (r264:75708, Oct 26 2009, 08:23:19) [MSC v.1500 32 bit (Intel)] on
win32
3. Run Module (F5) -> Bug#1: no error is shown
4. Run Module
