Index: cddl/contrib/opensolaris/lib/libdtrace/common/dt_consume.c
===================================================================
--- cddl/contrib/opensolaris/lib/libdtrace/common/dt_consume.c
+++ cddl/contrib/opensolaris/lib/libdtrace/common/dt_consume.c
@@ -24,7 +24,7 @@
  */

 /*
- * Copyright (c) 2013, Joyent, Inc. All rights reserved.
+ * Copyright (c) 2017, Joyent, Inc. All rights reserved.
  * Copyright (c) 2012 by Delphix. All rights reserved.
  */

@@ -3040,8 +3040,6 @@
 				break;

 			timestamp = dt_buf_oldest(buf, dtp);
-			assert(timestamp >= dtp->dt_last_timestamp);
-			dtp->dt_last_timestamp = timestamp;

 			if (timestamp == buf->dtbd_timestamp) {
 				/*
@@ -3056,6 +3054,8 @@
 					break;
 				continue;
 			}
+			assert(timestamp >= dtp->dt_last_timestamp);
+			dtp->dt_last_timestamp = timestamp;

 			if ((rval = dt_consume_cpu(dtp, fp,
 			    buf->dtbd_cpu, buf, B_TRUE, pf, rf, arg)) != 0)