_tkinter.TclError: expected integer but got "%#"

[Moosems]

root = Tk()
root.register_drop_target("*")
root.bind("<<Drop>>", print)
root.mainloop()

After dragging a file onto the window, I got this:

Exception in Tkinter callback
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/tkinter/__init__.py", line 1947, in __call__
    args = self.subst(*args)
           ^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/tkinter/__init__.py", line 1632, in _substitute
    e.serial = getint(nsign)
               ^^^^^^^^^^^^^
_tkinter.TclError: expected integer but got "%#"

[rdbende]

Duplicate of #4