3.0b2, WinXP
I cut and pasted the text above into an empty IDLE edit window, hit F5,
and in the blink of an eye, both IDLE windows disappeared.  No error
message, no Window's error box, just gone.

The pasted text was saved to the file.  When I added input() statements,
and ran with CPython directly, it got to the function call and then
crashed.  Rerunning with Idle with input() at the top, it still crashed,
indicating that it crashed during compilation and never started execution.