Index: lldb/trunk/source/Host/common/MainLoop.cpp
===================================================================
--- lldb/trunk/source/Host/common/MainLoop.cpp
+++ lldb/trunk/source/Host/common/MainLoop.cpp
@@ -108,7 +108,7 @@
                       out_events, llvm::array_lengthof(out_events), nullptr);
 
   if (num_events < 0)
-    return Status("kevent() failed with error %d\n", num_events);
+    return Status(errno, eErrorTypePOSIX);
   return Status();
 }