--- old/src/hotspot/share/runtime/biasedLocking.cpp	2020-01-17 22:49:27.028802210 +0000
+++ new/src/hotspot/share/runtime/biasedLocking.cpp	2020-01-17 22:49:25.397763489 +0000
@@ -668,8 +668,8 @@
 void BiasedLocking::walk_stack_and_revoke(oop obj, JavaThread* biased_locker) {
   assert(!SafepointSynchronize::is_at_safepoint() || !SafepointMechanism::uses_thread_local_poll(),
          "if SafepointMechanism::uses_thread_local_poll() is enabled this should always be executed outside safepoints");
-  assert(Thread::current() == biased_locker || Thread::current() == biased_locker->get_active_handshaker() ||
-         Thread::current()->is_VM_thread(), "wrong thread");
+  Thread* cur = Thread::current();
+  assert(cur == biased_locker || cur == biased_locker->get_active_handshaker() || cur->is_VM_thread(), "wrong thread");
 
   markWord mark = obj->mark();
   assert(mark.biased_locker() == biased_locker &&
@@ -678,14 +678,14 @@
   log_trace(biasedlocking)("%s(" INTPTR_FORMAT ") revoking object " INTPTR_FORMAT ", mark "
                            INTPTR_FORMAT ", type %s, prototype header " INTPTR_FORMAT
                            ", biaser " INTPTR_FORMAT " %s",
-                           Thread::current()->is_VM_thread() ? "VMThread" : "JavaThread",
-                           p2i(Thread::current()),
+                           cur->is_VM_thread() ? "VMThread" : "JavaThread",
+                           p2i(cur),
                            p2i(obj),
                            mark.value(),
                            obj->klass()->external_name(),
                            obj->klass()->prototype_header().value(),
                            p2i(biased_locker),
-                           Thread::current()->is_VM_thread() ? "" : "(walking own stack)");
+                           cur->is_VM_thread() ? "" : "(walking own stack)");
 
   markWord unbiased_prototype = markWord::prototype().set_age(obj->mark().age());