Just tested the latest master git branch (I saw that you made some changes 
Walter), and dcollections compiles and passes unit tests.

And it seems like 6912 fix is still intact (code in that bug fails to 
compile).  So I think we're good as far as this issue is concerned.

-Steve



----- Original Message -----
> From: Steve Schveighoffer <[email protected]>
> To: Discuss the dmd beta releases for D <[email protected]>
> Cc: 
> Sent: Friday, December 9, 2011 9:21 AM
> Subject: Re: [dmd-beta] Last (really, this time I mean it!) D2 beta 2.057
> 
> No, the issue is simply that the value type part of a slice (i.e. the length 
> and 
> the head-immutability of the pointer) can implicitly cast to and from 
> immutable.  This is the same as casting an immutable(int)* and a size_t to 
> immutable(int *) and immutable(size_t) respectively.
> 
> 
> As far as the regression, I'll test momentarily Kenji's pull request 
> that reverses the fix for 6912 against dcollections, and if everything builds 
> and tests properly, I'd say just reverse that for the release, put it back 
> in, and then fix the regression in the main branch for the next cycle.
> 
> If that's agreeable, I'll file a bug.  One question, is it good to file 
> quick-fix bugs for historical purposes?  I mean I just discovered the bug, 
> it's not in a released version yet, and it may be fixed or nullified 
> momentarily.
> 
> 
> -Steve
> 
> 
> 
> ----- Original Message -----
>>  From: Jason House <[email protected]>
>>  To: Discuss the dmd beta releases for D <[email protected]>
>>  Cc: 
>>  Sent: Friday, December 9, 2011 9:08 AM
>>  Subject: Re: [dmd-beta] Last (really, this time I mean it!) D2 beta 2.057
>> 
>> T he special handling of arrays always trip me up. It's strange that 
>>  immutable(int)[] can initialize immutable(int[]). What's even more 
> bizarre 
>>  is that immutable(int[]) can be assigned to immutable(int)[]
>> 
>>  Am I unique in the momentary confusion this causes? I think this property 
> is 
>>  unique to arrays. Can "alias this" cause a similar effect in 
> other 
>>  types?
>> 
>>  Sent from my iPhone
>> 
>>  On Dec 8, 2011, at 11:50 PM, Walter Bright <[email protected]> 
> wrote:
>> 
>>>   In any case, there needs to be a bugzilla entry for it.
>>> 
>>>   On 12/8/2011 7:39 PM, Steve Schveighoffer wrote:
>>>>   Still fails my latest mentioned regression:
>>>> 
>>>>   inout(int[]) foo(inout(int)[] x)
>>>>   {
>>>>       return x;
>>>>   }
>>>> 
>>>> 
>>>>   Error: cannot implicitly convert expression (x) of type 
> inout(int)[] to 
>>  inout(int[])
>>>> 
>>>> 
>>>>   Given that inout is relatively new to the implementation, I'm 
> not 
>>  sure how much existing code this breaks.  It certainly breaks dcollections, 
> but 
>>  I can just instruct people not to use 2.057, and I haven't done a beta 
>>  release of it since I added the inout decorations.
>>>> 
>>>>   So it might not be horrible if this goes out.  There is a valid 
>>  workaround (use a blunt cast).
>>>> 
>>>>   Again, sorry for the last-minute testing.  I've been busy with 
> work 
>>  lately.
>>>> 
>>>>   -Steve
>>>> 
>>>> 
>>>> 
>>>>   ----- Original Message -----
>>>>>   From: Walter Bright<[email protected]>
>>>>>   To: Discuss the dmd beta releases for 
>>  D<[email protected]>
>>>>>   Cc:
>>>>>   Sent: Thursday, December 8, 2011 9:47 PM
>>>>>   Subject: [dmd-beta] Last (really, this time I mean it!) D2 
> beta 
>>  2.057
>>>>> 
>>>>>   Includes Kenji's fix (thanks for the super quick 
> response!)
>>>>> 
>>>>>   http://ftp.digitalmars.com/dmd2beta.zip
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