[GROOVY-11079] GroovyCastException on closure implementing Consumer

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.12
• Fix Version/s: 4.0.13
• Component/s: Static compilation
• Assignee: Eric Milles
• Reporter: Christopher Smith
• Created: 02/Jun/23 21:00
• Updated: 23/Aug/23 09:05
• Resolved: 06/Jun/23 02:29

Description

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?

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

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)

  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

Issue Links

• is related to: GROOVY-11068 VerifyError when using generic container in closure