--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/LambdaToMethod.java	Tue Nov 26 02:32:32 2019 +0000
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/LambdaToMethod.java	Tue Nov 26 11:13:53 2019 +0530
@@ -2266,8 +2266,7 @@
 
             boolean isProtectedInSuperClassOfEnclosingClassInOtherPackage() {
                 return ((tree.sym.flags() & PROTECTED) != 0 &&
-                        tree.sym.packge() != owner.packge() &&
-                        !owner.enclClass().isSubClass(tree.sym.owner, types));
+                        tree.sym.packge() != owner.packge());
             }
 
             /**

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javac/lambda/methodReference/ProtectedInaccessibleMethodRefTest2.java	Tue Nov 26 11:13:53 2019 +0530
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8234729
+ * @summary Javac should eagerly change code generation for method references to avert IllegalAccessError in future.
+ * @run main ProtectedInaccessibleMethodRefTest2
+ */
+
+import pack.I;
+import pack.J;
+
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.function.Function;
+import java.lang.reflect.Method;
+import java.util.concurrent.Callable;
+
+public final class ProtectedInaccessibleMethodRefTest2 extends I {
+
+    public static void main(String... args) {
+        ProtectedInaccessibleMethodRefTest2 m = new ProtectedInaccessibleMethodRefTest2();
+        m.test(Paths.get("test"));
+        // Verify that the method reference has been folded into a lambda.
+        boolean lambdaFound = false;
+        for (Method meth : ProtectedInaccessibleMethodRefTest2.class.getDeclaredMethods()) {
+            if (meth.getName().equals("lambda$test$0")) {
+                lambdaFound = true;
+                break;
+            }
+        }
+        if (!lambdaFound) {
+            throw new AssertionError("Did not find evidence of new code generation");
+        }
+    }
+
+    void test(Path outputDir) {
+        Sub c = new Sub(this::readFile);
+        c.check(outputDir);
+    }
+    public class Sub extends J {
+        Sub(Function<Path,String> fileReader) {
+            super(fileReader);
+        }
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javac/lambda/methodReference/pack/I.java	Tue Nov 26 11:13:53 2019 +0530
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package pack;
+
+import java.nio.file.Path;
+
+public class I {
+    protected String readFile(Path file) {
+        return file.toString();
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javac/lambda/methodReference/pack/J.java	Tue Nov 26 11:13:53 2019 +0530
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package pack;
+
+import java.nio.file.Path;
+import java.util.function.Function;
+
+public class J {
+    protected final Function<Path,String> fileReader;
+
+    public J(Function<Path,String> fileReader) {
+        this.fileReader = fileReader;
+    }
+
+    protected void checkFile(Path file) {
+        fileReader.apply(file);
+    }
+
+    public void check(Path file) {
+        checkFile(file);
+    }
+}