--- old/src/hotspot/share/jfr/leakprofiler/leakProfiler.cpp	2018-11-26 21:30:16.220992411 +0100
+++ new/src/hotspot/share/jfr/leakprofiler/leakProfiler.cpp	2018-11-26 21:30:16.065993779 +0100
@@ -47,6 +47,11 @@
     return false;
   }
 
+  if (UseShenandoahGC) {
+    log_warning(jfr)("LeakProfiler is currently not supported in combination with Shenandoah GC");
+    return false;
+  }
+
   if (_object_sampler != NULL) {
     // already started
     return true;