https://www.graalvm.org/ 
final class com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject implements com.oracle.truffle.api.interop.TruffleObject
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject
  super_class: java.lang.Object
{
  private final java.lang.String error;
    descriptor: Ljava/lang/String;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final int errNum;
    descriptor: I
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  void <init>(java.lang.String, int);
    descriptor: (Ljava/lang/String;I)V
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
        start local 1 // java.lang.String error
        start local 2 // int errNum
         0: .line 281
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 282
            aload 0 /* this */
            aload 1 /* error */
            putfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.error:Ljava/lang/String;
         2: .line 283
            aload 0 /* this */
            iload 2 /* errNum */
            putfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.errNum:I
         3: .line 284
            return
        end local 2 // int errNum
        end local 1 // java.lang.String error
        end local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    4     0    this  Lcom/oracle/truffle/api/debug/test/TestDebugBuggyLanguage$ErrorObject;
            0    4     1   error  Ljava/lang/String;
            0    4     2  errNum  I
    MethodParameters:
        Name  Flags
      error   
      errNum  

  boolean hasMembers();
    descriptor: ()Z
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
         0: .line 288
            iconst_1
            ireturn
        end local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/debug/test/TestDebugBuggyLanguage$ErrorObject;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportMessage()

  boolean isMemberInsertable(java.lang.String);
    descriptor: (Ljava/lang/String;)Z
    flags: (0x0000) 
    Code:
      stack=1, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
        start local 1 // java.lang.String member
         0: .line 293
            iconst_0
            ireturn
        end local 1 // java.lang.String member
        end local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    1     0    this  Lcom/oracle/truffle/api/debug/test/TestDebugBuggyLanguage$ErrorObject;
            0    1     1  member  Ljava/lang/String;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportMessage()
    MethodParameters:
        Name  Flags
      member  

  public java.lang.Object getMembers(boolean);
    descriptor: (Z)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
        start local 1 // boolean internal
         0: .line 298
            ldc "KEYS"
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.error:Ljava/lang/String;
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 2
         1: .line 299
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.errNum:I
            invokestatic com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage.throwBug:(I)V
         2: .line 301
      StackMap locals:
      StackMap stack:
            new com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject$Keys
            dup
            invokespecial com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject$Keys.<init>:()V
            areturn
        end local 1 // boolean internal
        end local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    3     0      this  Lcom/oracle/truffle/api/debug/test/TestDebugBuggyLanguage$ErrorObject;
            0    3     1  internal  Z
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportMessage()
    MethodParameters:
          Name  Flags
      internal  

  boolean isMemberModifiable(java.lang.String);
    descriptor: (Ljava/lang/String;)Z
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
        start local 1 // java.lang.String member
         0: .line 306
            ldc "KEY_INFO"
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.error:Ljava/lang/String;
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 2
            ldc "A"
            aload 1 /* member */
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 2
         1: .line 307
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.errNum:I
            invokestatic com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage.throwBug:(I)V
         2: .line 309
      StackMap locals:
      StackMap stack:
            ldc "A"
            aload 1 /* member */
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifne 3
            ldc "B"
            aload 1 /* member */
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifne 3
            iconst_0
            ireturn
      StackMap locals:
      StackMap stack:
         3: iconst_1
            ireturn
        end local 1 // java.lang.String member
        end local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    4     0    this  Lcom/oracle/truffle/api/debug/test/TestDebugBuggyLanguage$ErrorObject;
            0    4     1  member  Ljava/lang/String;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportMessage()
    MethodParameters:
        Name  Flags
      member  

  boolean isMemberReadable(java.lang.String);
    descriptor: (Ljava/lang/String;)Z
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
        start local 1 // java.lang.String member
         0: .line 314
            ldc "KEY_INFO"
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.error:Ljava/lang/String;
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 2
            ldc "A"
            aload 1 /* member */
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 2
         1: .line 315
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.errNum:I
            invokestatic com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage.throwBug:(I)V
         2: .line 317
      StackMap locals:
      StackMap stack:
            ldc "A"
            aload 1 /* member */
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifne 3
            ldc "B"
            aload 1 /* member */
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifne 3
            iconst_0
            ireturn
      StackMap locals:
      StackMap stack:
         3: iconst_1
            ireturn
        end local 1 // java.lang.String member
        end local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    4     0    this  Lcom/oracle/truffle/api/debug/test/TestDebugBuggyLanguage$ErrorObject;
            0    4     1  member  Ljava/lang/String;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportMessage()
    MethodParameters:
        Name  Flags
      member  

  public java.lang.Object readMember(java.lang.String);
    descriptor: (Ljava/lang/String;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
        start local 1 // java.lang.String key
         0: .line 322
            ldc "READ"
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.error:Ljava/lang/String;
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 2
            ldc "A"
            aload 1 /* key */
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 2
         1: .line 323
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.errNum:I
            invokestatic com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage.throwBug:(I)V
         2: .line 325
      StackMap locals:
      StackMap stack:
            ldc "A"
            aload 1 /* key */
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 4
         3: .line 326
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.errNum:I
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            areturn
         4: .line 327
      StackMap locals:
      StackMap stack:
            ldc "B"
            aload 1 /* key */
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 6
         5: .line 328
            bipush 42
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            areturn
         6: .line 330
      StackMap locals:
      StackMap stack:
            aload 1 /* key */
            invokestatic com.oracle.truffle.api.interop.UnknownIdentifierException.create:(Ljava/lang/String;)Lcom/oracle/truffle/api/interop/UnknownIdentifierException;
            athrow
        end local 1 // java.lang.String key
        end local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0  this  Lcom/oracle/truffle/api/debug/test/TestDebugBuggyLanguage$ErrorObject;
            0    7     1   key  Ljava/lang/String;
    Exceptions:
      throws com.oracle.truffle.api.interop.UnknownIdentifierException
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportMessage()
    MethodParameters:
      Name  Flags
      key   

  public java.lang.Object writeMember(java.lang.String, java.lang.Object);
    descriptor: (Ljava/lang/String;Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
        start local 1 // java.lang.String key
        start local 2 // java.lang.Object value
         0: .line 336
            ldc "WRITE"
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.error:Ljava/lang/String;
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 2
            ldc "A"
            aload 1 /* key */
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 2
         1: .line 337
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.errNum:I
            invokestatic com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage.throwBug:(I)V
         2: .line 339
      StackMap locals:
      StackMap stack:
            ldc "A"
            aload 1 /* key */
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifne 3
            ldc "B"
            aload 1 /* key */
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 4
         3: .line 340
      StackMap locals:
      StackMap stack:
            aload 2 /* value */
            areturn
         4: .line 342
      StackMap locals:
      StackMap stack:
            aload 1 /* key */
            invokestatic com.oracle.truffle.api.interop.UnknownIdentifierException.create:(Ljava/lang/String;)Lcom/oracle/truffle/api/interop/UnknownIdentifierException;
            athrow
        end local 2 // java.lang.Object value
        end local 1 // java.lang.String key
        end local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    5     0   this  Lcom/oracle/truffle/api/debug/test/TestDebugBuggyLanguage$ErrorObject;
            0    5     1    key  Ljava/lang/String;
            0    5     2  value  Ljava/lang/Object;
    Exceptions:
      throws com.oracle.truffle.api.interop.UnknownIdentifierException
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportMessage()
    MethodParameters:
       Name  Flags
      key    
      value  

  public boolean isExecutable();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
         0: .line 348
            ldc "CAN_EXECUTE"
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.error:Ljava/lang/String;
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 2
         1: .line 349
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.errNum:I
            invokestatic com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage.throwBug:(I)V
         2: .line 351
      StackMap locals:
      StackMap stack:
            iconst_1
            ireturn
        end local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lcom/oracle/truffle/api/debug/test/TestDebugBuggyLanguage$ErrorObject;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportMessage()

  public java.lang.Object execute(java.lang.Object[]);
    descriptor: ([Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
        start local 1 // java.lang.Object[] args
         0: .line 356
            ldc "EXECUTE"
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.error:Ljava/lang/String;
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 2
         1: .line 357
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.errNum:I
            invokestatic com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage.throwBug:(I)V
         2: .line 359
      StackMap locals:
      StackMap stack:
            bipush 10
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            areturn
        end local 1 // java.lang.Object[] args
        end local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lcom/oracle/truffle/api/debug/test/TestDebugBuggyLanguage$ErrorObject;
            0    3     1  args  [Ljava/lang/Object;
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportMessage()
    MethodParameters:
      Name  Flags
      args  

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=1, args_size=1
        start local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
         0: .line 364
            new java.lang.StringBuilder
            dup
            ldc "ErrorObject "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.errNum:I
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.error:Ljava/lang/String;
            invokevirtual java.lang.String.isEmpty:()Z
            ifeq 1
            ldc ""
            goto 2
      StackMap locals:
      StackMap stack: java.lang.StringBuilder
         1: new java.lang.StringBuilder
            dup
            ldc " "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject.error:Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
      StackMap locals: com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject
      StackMap stack: java.lang.StringBuilder java.lang.String
         2: invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            areturn
        end local 0 // com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lcom/oracle/truffle/api/debug/test/TestDebugBuggyLanguage$ErrorObject;
}
SourceFile: "TestDebugBuggyLanguage.java"
NestHost: com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage
InnerClasses:
  final ErrorObject = com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject of com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage
  Keys = com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject$Keys of com.oracle.truffle.api.debug.test.TestDebugBuggyLanguage$ErrorObject
    RuntimeVisibleAnnotations: 
      com.oracle.truffle.api.library.ExportLibrary(value = Lcom/oracle/truffle/api/interop/InteropLibrary;)