diff -Nrup a/strace.c b/strace.c

--- a/strace.c	2015-04-22 12:48:38.000000000 -0600

+++ b/strace.c	2015-04-22 14:43:41.639193569 -0600

@@ -1928,7 +1928,7 @@ collect_stopped_tcbs(void)

 	nextp = &found_tcps;

 	found_tcps = NULL;

-	while (nprocs != 0) {

+	while (1) {

 		int wait_errno;

 		int status;

 		unsigned event;

@@ -2398,7 +2398,7 @@ trace(void)

 	int rc;

 	struct tcb *tcbs;

-	while (nprocs != 0) {

+	while (1) {

 		if (interrupted)

 			return 0;

 		tcbs = collect_stopped_tcbs();