Index: uspace/app/trace/ipcp.c
===================================================================
--- uspace/app/trace/ipcp.c	(revision 356acd03b058b7d85d7e5258b683635e430a3266)
+++ uspace/app/trace/ipcp.c	(revision 7dc62afbea468dbb599d204c3ca42380aa64a2ae)
@@ -288,5 +288,5 @@
 		oper = pcall->oper;
 
-		if (oper->rv_type != V_VOID || oper->respc > 0) {
+		if (oper != NULL && oper->rv_type != V_VOID || oper->respc > 0) {
 			printf("->");
 
@@ -332,13 +332,4 @@
 
 //	printf("ipcp_call_in()\n");
-/*	printf("phone: %d, method: ", call->in_phone_hash);
-	ipc_m_print(IPC_GET_METHOD(*call));
-	printf(" args: (%lu, %lu, %lu, %lu, %lu)\n",
-	    IPC_GET_ARG1(*call),
-	    IPC_GET_ARG2(*call),
-	    IPC_GET_ARG3(*call),
-	    IPC_GET_ARG4(*call),
-	    IPC_GET_ARG5(*call)
-	);*/
 
 	if ((hash & IPC_CALLID_ANSWERED) == 0 && hash != IPCP_CALLID_SYNC) {