Primary factory method should return a new instance

[sophie-kaleba]

(Same issue than in Newspeak, see https://groups.google.com/forum/#!msg/newspeaklanguage/PJeOLjxq_yA/ND3Jel_nAQAJ)

As per Newspeak spec, a call to a primary factory method should return a new instance of a given class. Sometimes it doesn't, as in:

class WhatDoesNewReturn = (
  true ifTrue: [ ^ nil ].
)()

where a call to WhatDoesNewReturn new will return nil instead of an instance of WhatDoesNewReturn.

[smarr]

Thanks for finding and documenting the issue!