Revamped concurrency API (Don can you contact Bartosz ?)

[Don]

Nick B wrote:
> Don wrote:
>> Nick B wrote:
>>> Nick B wrote:
>>>> Bartosz Milewski wrote:
>>>>> Nick B Wrote:
>>>>>>> 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.
>>>>>
>>>>> I can send you the files I have checked out.
>>>>> The problem was in core.thread. I tried to implement a struct Tid 
>>>>> (thread ID) with reference-counting semantics and deterministic 
>>>>> destruction. It passed all the tests, but when it was used in one 
>>>>> particular place in druntime it produced incorrect assembly. Even 
>>>>> the slightest change made the bug disappear, so I wasn't able to 
>>>>> reproduce it under controlled conditions.
>>>>>
>>>>> Unfortunately, I have undone some of my changes trying to bypass 
>>>>> the bug, so at the moment I don't even have the buggy version, but 
>>>>> it can be reconstructed. We can discuss it off-line, if you want. 
>>>>> Use my email address with -nospam removed.
>>>>
>>>> Bartosz
>>>>
>>>> I think that Don is the best person to contact you. I will try to 
>>>> contact him.
>>>>
>>>> Nick B
>>>
>>> Don, are you able to contact Bartosz, re the details of this test case.
>>>
>>> Nick B
>>
>> Bartosz has sent it to me. I can reproduce the error. It's my top 
>> priority, but it'll take a while -- it's nasty.
> 
> Don - can you advise the Bugzilla number for this ?
> 
> thanks
> Nick B
3423. My patch has already been included in the dmd svn, and Bartosz has 
a compiled DMD with the bug fixed.