What happens if my out-proc COM server exits without calling CoRevokeClassObject()?

MSDN says CoRevokeClassObject() informs COM that some COM class is no longer available for instantiation.

Every out-proc COM server I've seen always calls CoRevokeClassObject() for each class that it previously registered by calling CoRegisterClassObject() before its process terminates.

What happens if for whatever reason (a crash, for example) an out-proc COM server process terminates but doesn't开发者_Go百科 call CoRevokeClassObject()?