Index: /trunk/src/VBox/GuestHost/SharedClipboard/clipboard-x11.cpp
===================================================================
--- /trunk/src/VBox/GuestHost/SharedClipboard/clipboard-x11.cpp	(revision 82448)
+++ /trunk/src/VBox/GuestHost/SharedClipboard/clipboard-x11.cpp	(revision 82449)
@@ -1057,5 +1057,10 @@
 {
     AssertPtrReturn(pCtx,    VERR_INVALID_POINTER);
+#if !defined(SMOKETEST) && !defined(TESTCASE)
+    /* Smoktests / Testcases don't have a (valid) parent. */
     AssertPtrReturn(pParent, VERR_INVALID_POINTER);
+#endif
+
+    RT_BZERO(pCtx, sizeof(SHCLX11CTX));
 
     if (fHeadless)