$this instead of $0 - applicable with bytemancheck.sh?

[jaikiran]

The Byteman documentation says:

The trigger method recipient and parameters may be referred to by index using the symbols $0 (invalid for a static method), $1 etc. If the method has been compiled with the relevant debug options then symbolic references may also be used. So, for example, $this may be used as an alias for $0 and $myArg may be used as an alias for $1 if the method first parameter is declared with name myArg

I have this rule:

RULE Thread_Exit
CLASS java.lang.Thread
METHOD exit
AT ENTRY
IF  TRUE

DO 
System.out.println("Exit of thread " + $0)
ENDRULE

which when tested using bytemancheck.sh comes out clean without any errors. However, when I change $0 to $this:

RULE Thread_Exit
CLASS java.lang.Thread
METHOD exit
AT ENTRY
IF  TRUE

DO 
System.out.println("Exit of thread " + $this)
ENDRULE

bytemancheck.sh throws:

TestScript : Error transforming class java.lang.Thread using  rule "Thread_Exit" loaded from /home/jaikiran/Desktop/testbyteman.txt line 5

java.lang.Error: Failed to transform class java.lang.Thread using rule Thread_Exit

TestScript: 1 total errors
            0 parse errors
            0 type errors

Is this because, the original class was not compiled with debug info?

[adinn]

bytemancheck.sh throws:

TestScript : Error transforming class java.lang.Thread using  rule "Thread_Exit" loaded from /home/jaikiran/Desktop/testbyteman.txt line 5

java.lang.Error: Failed to transform class java.lang.Thread using rule Thread_Exit

TestScript: 1 total errors
            0 parse errors
            0 type errors

Is this because, the original class was not compiled with debug info?

The original class being java.lang.Thread. Yes, I think this is probably the case. You can easily check this by dumping the version of Thread.class in your boot classpath:

javap -c -private -verbose java.lang.Thread

My Sun jdk 1.6.0_14 has line numbers for all methods but no local variable tables.