FULL PRODUCT VERSION :
java version "1.8.0_144"
Java(TM) SE Runtime Environment (build 1.8.0_144-b01)
Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 10.0.14393]

A DESCRIPTION OF THE PROBLEM :
If a varargs function that only passes the arguments to another function rather than using them directly is bound after the first time it is called, binding fails with a "duplicate code" assertion if assertions are enabled.

REGRESSION. Last worked in version 8u121

ADDITIONAL REGRESSION INFORMATION:
The code does not assert in version 1.8.0_40; however, that is before the assertion was added, so I do not know if the underlying issue of generating duplicate function specializations is a regression.

java version "1.8.0_40"
Java(TM) SE Runtime Environment (build 1.8.0_40-b26)
Java HotSpot(TM) 64-Bit Server VM (build 25.40-b25, mixed mode)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the code listed in the "Source code for an executable test case" field with assertions enabled.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Only one function specialization should be generated when binding.
ACTUAL -
Two identical function specializations were generated, resulting in a "duplicate code" assertion.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "main" java.lang.AssertionError: duplicate code
at jdk.nashorn.internal.runtime.RecompilableScriptFunctionData.addCode(RecompilableScriptFunctionData.java:831)
at jdk.nashorn.internal.runtime.RecompilableScriptFunctionData.addCode(RecompilableScriptFunctionData.java:848)
at jdk.nashorn.internal.runtime.RecompilableScriptFunctionData.getBest(RecompilableScriptFunctionData.java:922)
at jdk.nashorn.internal.runtime.ScriptFunctionData.getGeneric(ScriptFunctionData.java:384)
at jdk.nashorn.internal.runtime.ScriptFunctionData.createGenericConstructor(ScriptFunctionData.java:298)
at jdk.nashorn.internal.runtime.ScriptFunctionData.getGenericConstructor(ScriptFunctionData.java:292)
at jdk.nashorn.internal.runtime.ScriptFunctionData.makeBoundFunctionData(ScriptFunctionData.java:429)
at jdk.nashorn.internal.runtime.ScriptFunction.createBound(ScriptFunction.java:392)
at jdk.nashorn.internal.runtime.linker.Bootstrap.bindCallable(Bootstrap.java:384)
at jdk.nashorn.internal.objects.NativeFunction.bind(NativeFunction.java:219)
at jdk.nashorn.internal.scripts.Script$\^eval\_.:program(<eval>:8)
at jdk.nashorn.internal.runtime.ScriptFunctionData.invoke(ScriptFunctionData.java:637)
at jdk.nashorn.internal.runtime.ScriptFunction.invoke(ScriptFunction.java:494)
at jdk.nashorn.internal.runtime.ScriptRuntime.apply(ScriptRuntime.java:393)
at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:449)
at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:406)
at jdk.nashorn.api.scripting.NashornScriptEngine.evalImpl(NashornScriptEngine.java:402)
at jdk.nashorn.api.scripting.NashornScriptEngine.eval(NashornScriptEngine.java:155)
at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:264)
at BindErrorTest.main(BindErrorTest.java:7)


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;

public class BindErrorTest {
    public static void main(String[] args) throws Exception {
        ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
        engine.eval("var fn2 = function () {};\n" +
                "\n" +
                "var fn = function () {\n" +
                " fn2.apply(null, arguments);\n" +
                "};\n" +
                "\n" +
                "fn();\n" +
                "fn.bind();\n");
    }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Create a new function that calls the desired function with the correct "this" and arguments instead of binding. Alternatively, don't enable assertions.