C:\apps\Python24>python.exe Lib\idlelib\idle.pyw -n

Write: a
An error trace is shown (since "a" is not defined)
and IDLE aborts (closes).

Python 2.4b2, winXP (sp2)
for win32 python and cygwin Python.

(I can't check without the "-n" switch since the
anti-virus blocks the socket connection)