--- old/src/share/vm/gc/g1/g1RemSet.cpp	2017-06-18 08:18:44.914200400 +0200
+++ new/src/share/vm/gc/g1/g1RemSet.cpp	2017-06-18 08:18:44.189408500 +0200
@@ -799,7 +799,8 @@
     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);
   }
@@ -812,7 +813,8 @@
     G1RemSetSummary current;
     current.initialize(this);
     ResourceMark rm;
-    current.print_on(log.trace_stream());
+    LogStream ls(log.trace());
+    current.print_on(&ls);
   }
 }