Index: pthread_dbg.c
===================================================================
RCS file: /cvsroot/src/lib/libpthread_dbg/pthread_dbg.c,v
retrieving revision 1.44
diff -u -r1.44 pthread_dbg.c
--- pthread_dbg.c	23 Jan 2016 14:02:21 -0000	1.44
+++ pthread_dbg.c	18 Nov 2016 20:48:57 -0000
@@ -186,7 +186,7 @@
 	val = READ(proc, proc->allqaddr, &allq, sizeof(allq));
 	if (val != 0)
 		return val;
-	
+
 	next = (void *)allq.ptqh_first;
 	while (next != NULL) {
 		val = td__getthread(proc, next, &thread);
@@ -196,8 +196,8 @@
 		if (val != 0)
 			return 0;
 
-		val = READ(proc, 
-		    next + offsetof(struct __pthread_st, pt_allq.ptqe_next), 
+		val = READ(proc,
+		    (caddr_t)((pthread_t)next)->pt_allq.ptqe_next,
 		    &next, sizeof(next));
 		if (val != 0)
 			return val;