Repair breakage in VirtualXactLock.

robertmhaas · robertmhaas · commit e76bcaba9cb3 · 2011-10-11T07:39:09.000-04:00
I broke this in commit 84e3712. Report and fix by Fujii Masao.
diff --git a/src/backend/storage/lmgr/lock.c b/src/backend/storage/lmgr/lock.c
@@ -3675,6 +3675,8 @@ VirtualXactLock(VirtualTransactionId vxid, bool wait)
 	 * it's no longer running anywhere.
 	 */
 	proc = BackendIdGetProc(vxid.backendId);
+	if (proc == NULL)
+		return true;
 
 	/*
 	 * We must acquire this lock before checking the backendId and lxid
