message: XFAIL TestMachCore for windows hosts
  It's been failing since I enabled the test for non-darwin targets. I
  made it reference the same bug as the linux core, as it's likely that
  the root cause is the same.
diff: @@ -26,6 +26,7 @@ class MachCoreTestCase(TestBase):
  lldb.DBG.SetSelectedPlatform(self._initial_platform)
  super(MachCoreTestCase, self).tearDown()
  + @expectedFailureAll(bugnumber="llvm.org/pr37371", hostoslist=["windows"])
  def test_selected_thread(self):
  """Test that the right thread is selected after a core is loaded."""
  # Create core form YAML.
  