8283224: Remove THREAD_NOT_ALIVE from possible JDWP error codes

Reviewed-by: alanb, sspitsyn

Author: plummercj

src/java.se/share/data/jdwp/jdwp.spec

@@ -3164,7 +3164,7 @@ JDWP "Java(tm) Debug Wire Protocol"
     (Constant THREAD_NOT_SUSPENDED   =13  "If the specified thread has not been "
                                           "suspended by an event.")
     (Constant THREAD_SUSPENDED       =14  "Thread already suspended.")
-    (Constant THREAD_NOT_ALIVE       =15  "Thread has not been started or has terminated.")
+    (Constant THREAD_NOT_ALIVE       =15  "Not used.")
     (Constant INVALID_OBJECT         =20  "If this reference type has been unloaded "
                                           "and garbage collected.")
     (Constant INVALID_CLASS          =21  "Invalid class.")

src/jdk.jdi/share/classes/com/sun/tools/jdi/ThreadReferenceImpl.java

@@ -595,9 +595,6 @@ public void forceEarlyReturn(Value returnValue) throws InvalidTypeException,
             case JDWP.Error.THREAD_NOT_SUSPENDED:
                 throw new IncompatibleThreadStateException(
                          "Thread not suspended");
-            case JDWP.Error.THREAD_NOT_ALIVE:
-                throw new IncompatibleThreadStateException(
-                                     "Thread has not started or has finished");
             case JDWP.Error.NO_MORE_FRAMES:
                 throw new InvalidStackFrameException(
                          "No more frames on the stack");