Segfault on 4.2.1 on armv7

I updated my personal knot-based container from 4.2.0 to 4.2.1 and it now fails to start up. Running kresd manually from inside the container shows that it's segfaulting on startup (core). Turning on verbose logging doesn't seem to reveal anything. This is on my RPi 4 running up-to-date Raspbian Buster (image runs without error on my MacBook Pro). If you have an armv7 environment to test with I've pushed two tags jonocoetzee/private-dns:v4.2.0 and jonocoetzee/private-dns:v4.2.1 (repo). Let me know if there's any other info you need.