On Sun, Feb 24, 2019 at 09:36:55PM +0100, Kamil Rytarowski wrote: > My only specific change was NetBSD/i386 kernel=GENERIC with kUBSan and > KCOV enabled. This does not answer the question. What does enabling kUBSan/KCOV break to make this error show up in your compilation, but not in our default builds? Martin