I built and installed ports, what built vs. did-not was the same as before applying the update, with the same failure details having nothing to do with this change. I then ran the FreeBSD kyua tests and the result match what I got prior to the update.
Jan 24 2020
Jan 23 2020
Summary: My preliminary testing looks good.
Dec 10 2019
Matching up with jhibbits comment: when I (cross) buildworld buildkernel for FreeBSD head to build to -r355547 from scratch, targeting 32-bit powerpc, using the gnu linker with the system-clang, the log shows 2016 notices of the structure: