[jira] [Created] (GROOVY-11079) GroovyCastException on closure implementing Consumer

[Christopher Smith (Jira)]

Christopher Smith created GROOVY-11079:
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             Summary: GroovyCastException on closure implementing Consumer
                 Key: GROOVY-11079
                 URL: https://issues.apache.org/jira/browse/GROOVY-11079
             Project: Groovy
          Issue Type: Bug
          Components: Static compilation
    Affects Versions: 4.0.12
            Reporter: Christopher Smith


I'm having trouble making a minimal repro for this one, but here's the actual 
code. Libraries are PDFBox (PDDocument) and Vavr. The bytecode problem seems to 
be that although 31 pushes {{null}} onto the stack, it's popped before being 
cast to {{Void}}, leaving the {{String}} on top. Shouldn't these be reversed?

{code}
loadOriginal(ep.payload)
  .onSuccess { sps.envelope.filename = it._1 }  // exception thrown at the end 
of this closure
  .<PDDocument> map(Tuple2::_2)
{code}

{code}
org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast 
object 'dummy.pdf' with class 'java.lang.String' to class 'java.lang.Void'
        at 
org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnSAM(DefaultTypeTransformation.java:424)
        at 
org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnNumber(DefaultTypeTransformation.java:335)
        at 
org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToType(DefaultTypeTransformation.java:255)
        at 
org.codehaus.groovy.vmplugin.v8.IndyInterface.fromCache(IndyInterface.java:321)
        at 
com.example.EsignFinisherImpl$_notifySignatureApplied_closure2$_closure11.doCall(EsignFinisherImpl.groovy:70)
{code}

{code}
  public java.lang.Void doCall(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Ljava/lang/Void;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=2
         0: aload_1
         1: checkcast     #35                 // class io/vavr/Tuple2
         4: getfield      #38                 // Field 
io/vavr/Tuple2._1:Ljava/lang/Object;
         7: dup
         8: astore_2
         9: aload_0
        10: getfield      #27                 // Field 
sps:Lgroovy/lang/Reference;
        13: invokevirtual #44                 // Method 
groovy/lang/Reference.get:()Ljava/lang/Object;
        16: checkcast     #46                 // class SignaturePageSpec
        19: invokevirtual #50                 // Method 
SignaturePageSpec.getEnvelope:()LSignaturePageSpec$Envelope;
        22: aload_2
        23: invokedynamic #64,  0             // InvokeDynamic 
#0:cast:(Ljava/lang/Object;)Ljava/lang/String;
        28: invokevirtual #70                 // Method 
SignaturePageSpec$Envelope.setFilename:(Ljava/lang/String;)V
        31: aconst_null
        32: pop
        33: invokedynamic #72,  0             // InvokeDynamic 
#0:cast:(Ljava/lang/Object;)Ljava/lang/Void;
        38: areturn
{code}



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