I just found that 4 out of 6 Intel build slots on Hydra have been occupied for the last 10+ hours on more instances of this bug:
https://hydra.gnu.org/build/3281985 https://hydra.gnu.org/build/3281874 https://hydra.gnu.org/build/3281957 https://hydra.gnu.org/build/3281830 I killed these jobs. Mark
