This is bug or not? (immutable class containing struct with dtor)

[Denis Feklushkin]

On Friday, 17 December 2021 at 17:27:53 UTC, Denis Feklushkin 
wrote:

>     ~this() {} // Comment out this to fix this compilation  
> error:
>     // Error: `immutable` method `serializer_bug.Imm.~this` is

("serializer_bug" is just name of my local .d file)