JDK-8187962 : Optimistic types ignore JavaAdapter return types
  • Type: Bug
  • Component: core-libs
  • Sub-Component: jdk.nashorn
  • Affected Version: 9
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2017-09-26
  • Updated: 2017-10-09
  • Resolved: 2017-09-27
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JDK 10
10 b25Fixed
Related Reports
Duplicate :  
JDK-8188019 - Nashorn bug in Invocable.getInterface
Relates :  
JDK-8184241 - Fix nashorn/samples/filebrowser.js
Description
When implementing Java methods in Nashorn, optimistic types are not aware of the return type of the implemented method. This results in an incompatible method handle conversion from primitive to object return type:

jjs> l = new java.util.List() { iterator: function() { return foo(); }};
jdk.nashorn.javaadapters.java_util_List@7e9131d5
jjs> l.iterator()
java.lang.invoke.WrongMethodTypeException: cannot convert MethodHandle(ScriptFunction,Object)int to (ScriptFunction,Object)Iterator
java.lang.invoke.WrongMethodTypeException: cannot convert MethodHandle(ScriptFunction,Object)int to (ScriptFunction,Object)Iterator
	at java.base/java.lang.invoke.MethodHandle.asTypeUncached(MethodHandle.java:858)
	at java.base/java.lang.invoke.MethodHandle.asType(MethodHandle.java:844)
	at jdk.dynalink/jdk.dynalink.TypeConverterFactory.asType(TypeConverterFactory.java:280)
	at jdk.dynalink/jdk.dynalink.LinkerServicesImpl.asType(LinkerServicesImpl.java:131)
	at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.CompiledFunction.changeReturnType(CompiledFunction.java:734)
	at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.CompiledFunction.createInvoker(CompiledFunction.java:718)
	at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.CompiledFunction.access$200(CompiledFunction.java:62)
	at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.CompiledFunction$2.get(CompiledFunction.java:680)
	at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.CompiledFunction$2.get(CompiledFunction.java:677)
	at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.CompiledFunction.getValidOptimisticInvocation(CompiledFunction.java:623)
	at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.CompiledFunction.createFunctionInvocation(CompiledFunction.java:677)
	at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.ScriptFunction.findCallMethod(ScriptFunction.java:949)
	at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.ScriptObject.lookup(ScriptObject.java:1874)
	at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.linker.NashornLinker.getGuardedInvocation(NashornLinker.java:104)
	at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.linker.NashornLinker.getGuardedInvocation(NashornLinker.java:96)
	at jdk.dynalink/jdk.dynalink.linker.support.CompositeTypeBasedGuardingDynamicLinker.getGuardedInvocation(CompositeTypeBasedGuardingDynamicLinker.java:184)
	at jdk.dynalink/jdk.dynalink.linker.support.CompositeGuardingDynamicLinker.getGuardedInvocation(CompositeGuardingDynamicLinker.java:132)
	at jdk.dynalink/jdk.dynalink.LinkerServicesImpl.lambda$getGuardedInvocation$0(LinkerServicesImpl.java:160)
	at jdk.dynalink/jdk.dynalink.LinkerServicesImpl.getWithLookupInternal(LinkerServicesImpl.java:191)
	at jdk.dynalink/jdk.dynalink.LinkerServicesImpl.getGuardedInvocation(LinkerServicesImpl.java:158)
	at jdk.dynalink/jdk.dynalink.DynamicLinker.relink(DynamicLinker.java:265)
	at jdk.nashorn.javaadapters.java_util_List.iterator(Unknown Source)
	at jdk.scripting.nashorn.scripts/jdk.nashorn.internal.scripts.Script$Recompilation$3$\^shell\_/1604353554.:program(<shell>:1)
	at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.ScriptFunctionData.invoke(ScriptFunctionData.java:655)
	at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.ScriptFunction.invoke(ScriptFunction.java:513)
	at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.ScriptRuntime.apply(ScriptRuntime.java:517)
	at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.Context.eval(Context.java:861)
	at jdk.scripting.nashorn/jdk.nashorn.internal.runtime.Context.eval(Context.java:796)
	at jdk.scripting.nashorn.shell/jdk.nashorn.tools.jjs.Main.readEvalPrint(Main.java:218)
	at jdk.scripting.nashorn/jdk.nashorn.tools.Shell.run(Shell.java:175)
	at jdk.scripting.nashorn.shell/jdk.nashorn.tools.jjs.Main.main(Main.java:104)
	at jdk.scripting.nashorn.shell/jdk.nashorn.tools.jjs.Main.main(Main.java:80)