@craigbro There is already a merge request available for your issue:
https://codeberg.org/guix/guix/pulls/1207
It's only affecting *old* installations (e.g., the official 1.4 release binaries) and riscv64 SoCs with >= 8 cores. It's already fixed in newer `gnulib` releases, but the way how #guix works, perfectly reproduces this historic bug as well.