Scala's ScriptEngine cannot evaluate compiled script second time











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I have the the following code:



val engine = new ScriptEngineManager().getEngineByName("scala").asInstanceOf[ScriptEngine with Invocable with Compilable]

  val script = """def incrementN(n: Int)= {

                 |  n+1

                 |}

                 |

                 |incrementN(n.asInstanceOf[Int])"""

  engine.getContext.setAttribute("n", 0,  ScriptContext.ENGINE_SCOPE)

  val compiled = engine.compile(script)

  println(compiled.eval())

  println(compiled.eval())


First time script executes without problems, but the next same evaluation fails with:




Exception in thread "main" scala.tools.nsc.interpreter.IMain$ReadEvalPrint$EvalException: Failed to load '$line6.$eval': $line6.$eval
at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalError(IMain.scala:745)
at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.load(IMain.scala:749)
at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalClass$lzycompute(IMain.scala:752)
at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalClass(IMain.scala:752)
at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalMethod(IMain.scala:795)
at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.call(IMain.scala:730)
at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.callEither(IMain.scala:739)
at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalEither(IMain.scala:754)
at scala.tools.nsc.interpreter.Scripted$WrappedRequest.$anonfun$evalEither$3(Scripted.scala:208)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
at scala.Console$.withIn(Console.scala:226)
at scala.tools.nsc.interpreter.Scripted$WrappedRequest.$anonfun$evalEither$2(Scripted.scala:208)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
at scala.Console$.withErr(Console.scala:192)
at scala.tools.nsc.interpreter.Scripted$WrappedRequest.$anonfun$evalEither$1(Scripted.scala:207)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
at scala.Console$.withOut(Console.scala:163)
at scala.tools.nsc.interpreter.Scripted$WrappedRequest.evalEither(Scripted.scala:206)
at scala.tools.nsc.interpreter.Scripted$WrappedRequest.$anonfun$eval$1(Scripted.scala:247)
at scala.tools.nsc.interpreter.Scripted.withScriptContext(Scripted.scala:124)
at scala.tools.nsc.interpreter.Scripted$WrappedRequest.eval(Scripted.scala:225)
at javax.script.CompiledScript.eval(CompiledScript.java:106)




scala version is 2.12.7
java version "1.8.0_144"



Could you please help me figured out, in what might be this issue?






scala scriptengine scala-2.12







share|improve this question


























    up vote
    0
    down vote

    favorite












    I have the the following code:



    val engine = new ScriptEngineManager().getEngineByName("scala").asInstanceOf[ScriptEngine with Invocable with Compilable]
    
  val script = """def incrementN(n: Int)= {
    
                 |  n+1
    
                 |}
    
                 |
    
                 |incrementN(n.asInstanceOf[Int])"""
    
  engine.getContext.setAttribute("n", 0,  ScriptContext.ENGINE_SCOPE)
    
  val compiled = engine.compile(script)
    
  println(compiled.eval())
    
  println(compiled.eval())


    First time script executes without problems, but the next same evaluation fails with:




    Exception in thread "main" scala.tools.nsc.interpreter.IMain$ReadEvalPrint$EvalException: Failed to load '$line6.$eval': $line6.$eval
    at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalError(IMain.scala:745)
    at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.load(IMain.scala:749)
    at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalClass$lzycompute(IMain.scala:752)
    at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalClass(IMain.scala:752)
    at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalMethod(IMain.scala:795)
    at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.call(IMain.scala:730)
    at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.callEither(IMain.scala:739)
    at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalEither(IMain.scala:754)
    at scala.tools.nsc.interpreter.Scripted$WrappedRequest.$anonfun$evalEither$3(Scripted.scala:208)
    at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
    at scala.Console$.withIn(Console.scala:226)
    at scala.tools.nsc.interpreter.Scripted$WrappedRequest.$anonfun$evalEither$2(Scripted.scala:208)
    at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
    at scala.Console$.withErr(Console.scala:192)
    at scala.tools.nsc.interpreter.Scripted$WrappedRequest.$anonfun$evalEither$1(Scripted.scala:207)
    at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
    at scala.Console$.withOut(Console.scala:163)
    at scala.tools.nsc.interpreter.Scripted$WrappedRequest.evalEither(Scripted.scala:206)
    at scala.tools.nsc.interpreter.Scripted$WrappedRequest.$anonfun$eval$1(Scripted.scala:247)
    at scala.tools.nsc.interpreter.Scripted.withScriptContext(Scripted.scala:124)
    at scala.tools.nsc.interpreter.Scripted$WrappedRequest.eval(Scripted.scala:225)
    at javax.script.CompiledScript.eval(CompiledScript.java:106)




    scala version is 2.12.7
    java version "1.8.0_144"



    Could you please help me figured out, in what might be this issue?






    scala scriptengine scala-2.12







    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I have the the following code:



      val engine = new ScriptEngineManager().getEngineByName("scala").asInstanceOf[ScriptEngine with Invocable with Compilable]
      
  val script = """def incrementN(n: Int)= {
      
                 |  n+1
      
                 |}
      
                 |
      
                 |incrementN(n.asInstanceOf[Int])"""
      
  engine.getContext.setAttribute("n", 0,  ScriptContext.ENGINE_SCOPE)
      
  val compiled = engine.compile(script)
      
  println(compiled.eval())
      
  println(compiled.eval())


      First time script executes without problems, but the next same evaluation fails with:




      Exception in thread "main" scala.tools.nsc.interpreter.IMain$ReadEvalPrint$EvalException: Failed to load '$line6.$eval': $line6.$eval
      at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalError(IMain.scala:745)
      at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.load(IMain.scala:749)
      at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalClass$lzycompute(IMain.scala:752)
      at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalClass(IMain.scala:752)
      at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalMethod(IMain.scala:795)
      at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.call(IMain.scala:730)
      at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.callEither(IMain.scala:739)
      at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalEither(IMain.scala:754)
      at scala.tools.nsc.interpreter.Scripted$WrappedRequest.$anonfun$evalEither$3(Scripted.scala:208)
      at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
      at scala.Console$.withIn(Console.scala:226)
      at scala.tools.nsc.interpreter.Scripted$WrappedRequest.$anonfun$evalEither$2(Scripted.scala:208)
      at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
      at scala.Console$.withErr(Console.scala:192)
      at scala.tools.nsc.interpreter.Scripted$WrappedRequest.$anonfun$evalEither$1(Scripted.scala:207)
      at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
      at scala.Console$.withOut(Console.scala:163)
      at scala.tools.nsc.interpreter.Scripted$WrappedRequest.evalEither(Scripted.scala:206)
      at scala.tools.nsc.interpreter.Scripted$WrappedRequest.$anonfun$eval$1(Scripted.scala:247)
      at scala.tools.nsc.interpreter.Scripted.withScriptContext(Scripted.scala:124)
      at scala.tools.nsc.interpreter.Scripted$WrappedRequest.eval(Scripted.scala:225)
      at javax.script.CompiledScript.eval(CompiledScript.java:106)




      scala version is 2.12.7
      java version "1.8.0_144"



      Could you please help me figured out, in what might be this issue?






      scala scriptengine scala-2.12







      share|improve this question













      I have the the following code:



      val engine = new ScriptEngineManager().getEngineByName("scala").asInstanceOf[ScriptEngine with Invocable with Compilable]
      
  val script = """def incrementN(n: Int)= {
      
                 |  n+1
      
                 |}
      
                 |
      
                 |incrementN(n.asInstanceOf[Int])"""
      
  engine.getContext.setAttribute("n", 0,  ScriptContext.ENGINE_SCOPE)
      
  val compiled = engine.compile(script)
      
  println(compiled.eval())
      
  println(compiled.eval())


      First time script executes without problems, but the next same evaluation fails with:




      Exception in thread "main" scala.tools.nsc.interpreter.IMain$ReadEvalPrint$EvalException: Failed to load '$line6.$eval': $line6.$eval
      at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalError(IMain.scala:745)
      at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.load(IMain.scala:749)
      at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalClass$lzycompute(IMain.scala:752)
      at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalClass(IMain.scala:752)
      at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalMethod(IMain.scala:795)
      at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.call(IMain.scala:730)
      at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.callEither(IMain.scala:739)
      at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.evalEither(IMain.scala:754)
      at scala.tools.nsc.interpreter.Scripted$WrappedRequest.$anonfun$evalEither$3(Scripted.scala:208)
      at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
      at scala.Console$.withIn(Console.scala:226)
      at scala.tools.nsc.interpreter.Scripted$WrappedRequest.$anonfun$evalEither$2(Scripted.scala:208)
      at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
      at scala.Console$.withErr(Console.scala:192)
      at scala.tools.nsc.interpreter.Scripted$WrappedRequest.$anonfun$evalEither$1(Scripted.scala:207)
      at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
      at scala.Console$.withOut(Console.scala:163)
      at scala.tools.nsc.interpreter.Scripted$WrappedRequest.evalEither(Scripted.scala:206)
      at scala.tools.nsc.interpreter.Scripted$WrappedRequest.$anonfun$eval$1(Scripted.scala:247)
      at scala.tools.nsc.interpreter.Scripted.withScriptContext(Scripted.scala:124)
      at scala.tools.nsc.interpreter.Scripted$WrappedRequest.eval(Scripted.scala:225)
      at javax.script.CompiledScript.eval(CompiledScript.java:106)




      scala version is 2.12.7
      java version "1.8.0_144"



      Could you please help me figured out, in what might be this issue?






      scala scriptengine scala-2.12




      scala scriptengine scala-2.12






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 7 at 12:57









      Hartkip

      34




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