https://issues.dlang.org/show_bug.cgi?id=21821
Mathias LANG <pro.mathias.l...@gmail.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |pro.mathias.l...@gmail.com --- Comment #2 from Mathias LANG <pro.mathias.l...@gmail.com> --- Where is this specified ? `immutable` should never change, that's the point! I've never seen, nor heard, that `immutable` could be violated in `@system`. This code in `core.lifetime` exhibits UB and should be changed to apply `immutable` after the `memcpy`, e.g. as `assummeUnique` does. --