On 2010-11-27, at 11:21, David Allsopp wrote:

> and set Warning 28 to be on by default for [Foo _] - that would simply mean that 3.11/3.12 code using that syntax would emit warnings in "3.13" rather than actually breaking (unless you've including -warn-error - but that's always seemed to me to be a development option, not a release option...)


Hear, hear!  This is in fact very important and bears repeating:
don't use -warn-error in released code.

-- Damien