kis (https://twitter.com/kis) got a javac error!

compile.log

An exception has occurred in the compiler (11-internal). Please file a bug against the Java compiler via the Java bug reporting page (http://bugreport.java.com) after checking the Bug Database (http://bugs.java.com) for duplicates. Include your program and the following diagnostic in your report. Thank you.
java.lang.AssertionError: Unexpected intersection type: java.lang.Object&java.io.Serializable&java.lang.Comparable<? extends java.lang.Object&java.io.Serializable&java.lang.Comparable<?>>
        at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.enterInner(ClassWriter.java:1043)
        at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter$CWSignatureGenerator.classReference(ClassWriter.java:312)
        at jdk.compiler/com.sun.tools.javac.code.Types$SignatureGenerator.assembleClassSig(Types.java:5105)
        at jdk.compiler/com.sun.tools.javac.code.Types$SignatureGenerator.assembleSig(Types.java:5037)
        at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter$CWSignatureGenerator.assembleSig(ClassWriter.java:291)
        at jdk.compiler/com.sun.tools.javac.code.Types$SignatureGenerator.assembleSig(Types.java:5148)
        at jdk.compiler/com.sun.tools.javac.code.Types$SignatureGenerator.assembleClassSig(Types.java:5124)
        at jdk.compiler/com.sun.tools.javac.code.Types$SignatureGenerator.assembleSig(Types.java:5037)
        at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter$CWSignatureGenerator.assembleSig(ClassWriter.java:291)
        at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.typeSig(ClassWriter.java:334)
        at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.writeCode(ClassWriter.java:1271)
        at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.writeMethod(ClassWriter.java:1158)
        at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.writeMethods(ClassWriter.java:1653)
        at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.writeClassFile(ClassWriter.java:1761)
        at jdk.compiler/com.sun.tools.javac.jvm.ClassWriter.writeClass(ClassWriter.java:1679)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.genCode(JavaCompiler.java:752)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1630)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1598)
        at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:968)
        at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:306)
        at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:165)
        at jdk.compiler/com.sun.tools.javac.Main.compile(Main.java:57)
        at jdk.compiler/com.sun.tools.javac.Main.main(Main.java:43)

run

changeset:   49270:f6ad4d73c834
tag:         tip
user:        erikj
date:        Tue Mar 20 17:42:20 2018 -0700
summary:     8199884: JDK-8199749 broke build with make 3.81

./jdk/build/linux-x86_64-normal-server-release/jdk/bin/javac -g Test.java 1>compile.log 2>compile.log