FutureNode does not always yield correct selectors

[codeZeilen]

FutureNode yields futureDo or futureSend message sends, depending on whether the result of the send is being used or not. The difference between the two is that only futureSend returns a Promise.

The logic for determining whether the result is being used seems incomplete. E.g. the following example does not work:

result := [(2 future: 100) + 3] on: Error do: [].
result then: [:sum | Transcript showln: sum]

Also: There are no tests currently. :P

[codeZeilen]

FixFuturePromises.1.zip

Proposed change set with tests. Other tests are in PromiseTest.

Also: Futures should not be in Kernel but in System, as they heavily rely on Project.

[codeZeilen]

Fixed in Compiler-pre.493