--- old/src/hotspot/share/gc/shared/vmGCOperations.cpp	2018-10-18 16:42:42.925581932 +0200
+++ new/src/hotspot/share/gc/shared/vmGCOperations.cpp	2018-10-18 16:42:42.504568973 +0200
@@ -81,7 +81,6 @@
 }
 
 bool VM_GC_Operation::doit_prologue() {
-  assert(Thread::current()->is_Java_thread(), "just checking");
   assert(((_gc_cause != GCCause::_no_gc) &&
           (_gc_cause != GCCause::_no_cause_specified)), "Illegal GCCause");
 
@@ -110,7 +109,6 @@
 
 
 void VM_GC_Operation::doit_epilogue() {
-  assert(Thread::current()->is_Java_thread(), "just checking");
   // Clean up old interpreter OopMap entries that were replaced
   // during the GC thread root traversal.
   OopMapCache::cleanup_old_entries();