1769757 - Change the UUID of nsISupports

Status: RESOLVED WONTFIX

(Core :: XPCOM, task, P5)

Description

[Andrew McCreight [:mccr8]]

This is probably a WONTFIX, because there's no real benefit to doing this, but I figured I'd record the results of my investigation somewhere. Anyways, while I was looking at bug 1514936, which breaks binary compatibility between nsIFactory and the MSCOM factory, Nika was curious as to whether we still need binary compatibility between nsISupports and the MSCOM IUnknown. I followed her suggestion and changed the UUID of nsISupports to see if anything broke. It was actually fine, except for tests related to principal serialization, but there's already a mechanism in the serialization code to deal with changing UUIDs, so using that was enough to get tests to pass.

Comment 1

[Andrew McCreight [:mccr8]]

Attachment: Change nsISupport IID.

I'm not sure why you'd want to do this, but tests seem to pass if you do.