With the addition of a Thread constructor that can suppress the inheriting
of inheritable thread-local variable initial values from the constructing
thread JDK-8056152, the usages of ManagedLocalsThread were removed
from the base module. ManagedLocalsThread was also removed from the
hierarchy of InnocuousThread, to help reduce dependencies. As a result
InnocuousThread is no longer a ManagedLocalsThread, and the
CleanerImpl should not use it in its instance of check.

diff --git a/src/java.base/share/classes/jdk/internal/misc/CleanerImpl.java b/src/java.base/share/classes/jdk/internal/misc/CleanerImpl.java
--- a/src/java.base/share/classes/jdk/internal/misc/CleanerImpl.java
+++ b/src/java.base/share/classes/jdk/internal/misc/CleanerImpl.java
@@ -39,7 +39,6 @@
import java.util.function.Function;

import sun.misc.InnocuousThread;
-import sun.misc.ManagedLocalsThread;

/**
 * CleanerImpl manages a set of object references and corresponding cleaning actions.
@@ -130,8 +129,8 @@
     */
    public void run() {
        Thread t = Thread.currentThread();
- ManagedLocalsThread mlThread = (t instanceof ManagedLocalsThread)
- ? (ManagedLocalsThread) t
+ InnocuousThread mlThread = (t instanceof InnocuousThread)
+ ? (InnocuousThread) t
                : null;
        while (!phantomCleanableList.isListEmpty() ||
                !weakCleanableList.isListEmpty() ||