This is a backend bug. It was discovered in the development of https://github.com/dlang/dmd/pull/7388 and merging that PR and running the DMD test suite on 32-bit platforms is the only known way of reproducing the bug.
Once the backend bug is fixed, development can continue on issue 15630
Comment #1 by robert.schadek — 2024-12-13T18:56:00Z