[11] RFR JDK-8198653: ClassLoader::getSystemClassLoader throws InternalError when called after shutdown

[mandy chung]

JDK-8198249 added a new shutdown VM initLevel.  
ClassLoader::getSystemClassLoader
should be updated to handle the new case.  I checked all other callers of
VM::initLevel and no other place needs update.

Thanks
Mandy

diff --git a/src/java.base/share/classes/java/lang/ClassLoader.java 
b/src/java.base/share/classes/java/lang/ClassLoader.java
--- a/src/java.base/share/classes/java/lang/ClassLoader.java
+++ b/src/java.base/share/classes/java/lang/ClassLoader.java
@@ -1922,7 +1922,7 @@
             case 3:
                 String msg = "getSystemClassLoader cannot be called during the 
system class loader instantiation";
                 throw new IllegalStateException(msg);
-            case 4:
+            default:
                 // system fully initialized
                 assert VM.isBooted() && scl != null;
                 SecurityManager sm = System.getSecurityManager();
@@ -1930,8 +1930,6 @@
                     checkClassLoaderPermission(scl, 
Reflection.getCallerClass());
                 }
                 return scl;
-            default:
-                throw new InternalError("should not reach here");
         }
     }