--- old/src/os/windows/vm/osThread_windows.cpp	2015-08-12 14:09:10.000000000 +0200
+++ new/src/os/windows/vm/osThread_windows.cpp	2015-08-12 14:09:10.000000000 +0200
@@ -41,3 +41,7 @@
 // free_thread. Should follow pattern of Linux/Solaris code here.
 void OSThread::pd_destroy() {
 }
+
+bool OSThread::is_online() {
+  return true;
+}