https://issues.dlang.org/show_bug.cgi?id=19000 --- Comment #4 from James <triplejam at protonmail.com> --- The author of the library fixed the issue in release 1.12.10 Commit of fix for bug: https://github.com/etcimon/botan/commit/77aaa4f69ad61ddf43ab43f2d933edb64120102b --