abnormal program termination

[Ellery Newcomer]

I am running into an ICE on windows - Assertion Failure on such-and-such 
line in mtype.c - and I am trying to get a test command for to reduce it 
with the redoubtable dustmite.

Normally, 'abnormal program termination' is printed to the console; 
however if I try to redirect stderr for greppage purposes, windows 
presents me with a message box with the same message.

Any ideas how to disable this abomination?