dmd segmentation fault with duplicate class definition

[number]

On Thursday, 29 March 2018 at 21:18:02 UTC, Seb wrote:
> On Thursday, 29 March 2018 at 20:48:47 UTC, number wrote:
>> I'm learning, so no idea if this is known or what causes the 
>> segfault.
>>
>> [...]
>
> Always try the latest release when you run into an ICE - 
> chances are very good that it already has been fixed:
>
> https://run.dlang.io/is/OySBGO

the provoking line is commented out in that snippet. when 
commented in, all compilers give the segfault, including ldc 
ones. except for 'all dmd compilers..' with version <= 2.066.0