--- a/hotspot/src/share/vm/gc/g1/g1RemSet.cpp	Thu Jul 20 17:23:24 2017 -0700
+++ b/hotspot/src/share/vm/gc/g1/g1RemSet.cpp	Fri Jul 21 09:50:12 2017 +0200
@@ -730,7 +730,8 @@
     Log(gc, remset) log;
     log.trace("%s", header);
     ResourceMark rm;
-    _prev_period_summary.print_on(log.trace_stream());
+    LogStream ls(log.trace());
+    _prev_period_summary.print_on(&ls);
 
     _prev_period_summary.set(&current);
   }
@@ -742,7 +743,8 @@
     log.trace(" Cumulative RS summary");
     G1RemSetSummary current(this);
     ResourceMark rm;
-    current.print_on(log.trace_stream());
+    LogStream ls(log.trace());
+    current.print_on(&ls);
   }
 }