This test illustrate the problem:

testMethodPackageFromObsoleteClass
��� | pack method |
��� pack := self createNewPackageNamed: 'P1'.
��� foo := self createNewClassNamed: #FooForTest inPackage: pack.
��� foo compileSilently: 'bar ^42'.
��� method := foo>>#bar.
��� foo removeFromSystem.
��� self assert: (method packageFromOrganizer: pack organizer)equals: foo package.


This seems to happen in non silent tests that

- create a class/trait for test
- sends an announcement with a compiled method instance (like, method recategorized)
- remove the class/trait because they are for test only :)
- then, since the announcements are handled asychronously, a method from an obsolete category reaches somewhere, and RPackage explodes.