--- a/src/hotspot/os/windows/os_windows.cpp	Mon Feb 25 18:54:40 2019 -0800
+++ b/src/hotspot/os/windows/os_windows.cpp	Fri Feb 22 04:59:12 2019 -0800
@@ -602,7 +602,7 @@
   HANDLE interrupt_event = CreateEvent(NULL, true, false, NULL);
   if (interrupt_event == NULL) {
     delete osthread;
-    return NULL;
+    return false;
   }
   osthread->set_interrupt_event(interrupt_event);
   osthread->set_interrupted(false);
@@ -676,7 +676,7 @@
     CloseHandle(osthread->interrupt_event());
     thread->set_osthread(NULL);
     delete osthread;
-    return NULL;
+    return false;
   }
 
   Atomic::inc(&os::win32::_os_thread_count);