Revamped concurrency API

[Nick B]

Don wrote:
> Bartosz Milewski wrote:

> [snip]

> Please stay in touch, we will try to win you back...
> 
> Of the issues you mention, this one seems the easiest to address:
> 
>> As far as my thread work went, I had an almost working implementation 
>> of spawn, except for a nasty compiler bug which resisted all efforts 
>> to reduce it to a simple test case.
> 
> Could you give us _any_ kind of test case (even if it's enormous)?

Bartosz - are you able to provide a test case as requested by Don ?
Then it might be possible, to get this bug fixed.

Nick B.