slavapestov/factor — comment on commit c536c84c13686c2329baaca883f6b3a851cd6e74
File: vm/os-unix.cpp line 165
By slavapestov:

And if vm is null, you're in another thread.

In that case, you're just letting your signal handler return, which I believe re-executes the faulting instruction. Is this what we want here?