Norbert Hartl wrote:
> There was a test in 3.9 testing this (it failed). In 3.10
> the test got removed but I think it is a bug.
> 
> What do you think?

The test itself is buggy (see http://bugs.squeak.org/view.php?id=6347) 
but once you fix the test it illustrates a problem in WeakRegistry which 
needs to use a WeakIdentityKeyDictionary instead of a WeakKeyDictionary.

Cheers,
   - Andreas