[Bug d/95166] New: libphobos: core.cpuid.{cores,threads}PerCPU() returns wrong value

[ibuclaw at gdcproject dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95166

            Bug ID: 95166
           Summary: libphobos: core.cpuid.{cores,threads}PerCPU() returns
                    wrong value
           Product: gcc
           Version: 10.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: d
          Assignee: ibuclaw at gdcproject dot org
          Reporter: ibuclaw at gdcproject dot org
  Target Milestone: ---

Upstream fix is here: https://github.com/dlang/druntime/pull/2620

It's trivial, so can be backported to gcc-10 branch.