Linking the Twitter thread for background, since it matters to mention: 1) this is after libgcrypt 1.9.0's "textbook" heap overflow 2) libgcrypt 1.9.1, a security update, breaks --disable-asm builds on x86-64 because they also tried to do feature.

Bug in question is https://dev.gnupg.org/T5279. Won't do any good to post anything there though.