Implicit conversion of struct with methods to immutable in pure function fails

[Timoses]

On Monday, 16 July 2018 at 12:00:57 UTC, Simen Kjærås wrote:
> On Monday, 16 July 2018 at 11:43:03 UTC, Timoses wrote:
>> Why does this fail?
>
> It doesn't. Not using DMD 2.081.1 under Windows, at least. I 
> tried adding a bitfield since you mentioned it, but it compiles 
> nicely for me. Which version of DMD are you using, and are you 
> having the issues with the exact code you posted here?
>
> --
>   Simen

https://run.dlang.io/is/Pgs527

I'm on 2.080.1. But above is on latest 2.081.1 I believe.

Note that the bottom code snippet in the original post does work, 
while the first one does not.