src/java.base/share/classes/sun/invoke/anon/AnonymousClassLoader.java

@@ -23,14 +23,14 @@
  * questions.
  */
 
 package sun.invoke.anon;
 
+import java.io.EOFException;
 import java.io.IOException;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
-import sun.misc.IOUtils;
 
 /**
  * Anonymous class loader.  Will load any valid classfile, producing
  * a {@link Class} metaobject, without installing that class in the
  * system dictionary.  Therefore, {@link Class#forName(String)} will never

@@ -223,8 +223,12 @@
         java.net.URLConnection connection = url.openConnection();
         int contentLength = connection.getContentLength();
         if (contentLength < 0)
             throw new IOException("invalid content length "+contentLength);
 
-        return IOUtils.readFully(connection.getInputStream(), contentLength, true);
+        byte[] b = connection.getInputStream().readAllBytes();
+        if (b.length != contentLength)
+            throw new EOFException("Expected:" + contentLength + ", read:" + b.length);
+
+        return b;
     }
 }