dmd 1.063 and 2.048 release

[Lars T. Kyllingstad]

On Mon, 16 Aug 2010 23:33:26 +0900, Jordi wrote:

> On 08/16/2010 04:11 PM, Don wrote:
>> Brad Roberts wrote:
>>> On 8/15/2010 12:54 PM, Walter Bright wrote:
>>>> Nick Sabalausky wrote:
>>>>> This may be a pain to do, but you could narrow it down from the
>>>>> other direction: recompile DMD from various trunk revisions between
>>>>> 2.046 and 2.047
>>>>> and see which actual commit created the problem.
>>>> Try mixing/matching the compiler & Phobos to see which one of those
>>>> caused the
>>>> issue.
>>>
>>> While I agree that it's worth trying a bisection -- it's generally
>>> really quick
>>> and easy to do (the compiler and libraries build rather fast -- about
>>> a minute
>>> for me). It can be a very useful technique for finding where bugs were
>>> introduced.
>>>
>>> That said, it's likely to be rather difficult for this release due to
>>> the number
>>> of fixes in the compiler that the library requires and for the periods
>>> during
>>> which the two didn't work together.
>>>
>>> Do try it.. worst case is you've wasted a little bit of time. Best
>>> case you've
>>> found the cause of the bug.
>>>
>>> Later,
>>> Brad
>>
>> The latest compiler should work with the old Phobos, except that it
>> will complain about the a&b==c bugs. That's simple to do, it just
>> involves copying the 2.048 compiler onto the 2.047 release. Knowing if
>> it is the compiler or Phobos/druntime would be an enormous help.
> 
> Found it. It took me 7 iterations of binary search across the svn
> repositories for dmd, druntime and phobos. The commit causing the issue
> is 505 in dmd. It is related to structs returning *this, which indeed i
> do in my maths structs.
> 
> Now, i don't know if the bug is in dmd or in my code, but i suspect that
> something is being treated as a reference when it shouldn't. Should i
> add an issue even if i am not sure?

Since DMD 2.021, 'this' for structs _is_ a reference.

-Lars