LinkageError: attempted duplicate class definition when --loader-per-compiler=false

 jjs --loader-per-compile=false
jjs> x = 3
3
jjs> x++
Exception in thread "main" java.lang.LinkageError: loader (instance of jdk/nashorn/internal/runtime/ScriptLoader): attempted duplicate class definition for name: "jdk/nashorn/internal/scripts/Script$\^shell\_"
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:752)
at jdk.nashorn.internal.runtime.ScriptLoader.installClass(ScriptLoader.java:62)
at jdk.nashorn.internal.runtime.Context$ContextCodeInstaller.install(Context.java:91)
at jdk.nashorn.internal.codegen.Compiler.install(Compiler.java:408)
at jdk.nashorn.internal.codegen.Compiler.install(Compiler.java:447)
at jdk.nashorn.internal.runtime.Context.compile(Context.java:800)
at jdk.nashorn.internal.runtime.Context.eval(Context.java:372)
at jdk.nashorn.tools.Shell.readEvalPrint(Shell.java:439)
at jdk.nashorn.tools.Shell.run(Shell.java:167)
at jdk.nashorn.tools.Shell.main(Shell.java:142)
at jdk.nashorn.tools.Shell.main(Shell.java:121)