thx. so far, all I can additionally verify is that switching BACK to gcc9 cures the failed-build problem; i.e., gcc9 build's OK == "succeeded". status here: https://build.opensuse.org/project/show/home:pgnd:Virtualization:qemu i understand that's a different statement than gcc10 _is_ the problem. poking around upstream & on gcc list(s) to see if i can find anything relevant ... before someone here provides any additional/useful insight. let me know if this^ should be moved to a separate bug. i s'pose Gary Lin may have some comment re: that.