Issue2498

I'm using; 
java 1.8 64-bit
python 3.5
jython 2.7
I have java methods needed to be reached from a python file. This is why I am using jython. And, I need to use a python debugger from java executor. Therefore, I'm creating a java process with the command "jython -m pdb script.py". 
Jump command is a critical command for my usage. However, it does not work. "TypeError: readonly attribute" error is given at line 705 in jython\lib pdb.py file, which is "self.curframe.f_lineno = arg".

I tried to execute "jump" command of pdb lib. I'm using Jython (in a Java application). Command comes with this error:
Traceback (most recent call last):
  File "C:\pdb_jump.py", line 20, in <module>
    result = []
  File "C:\jython\Lib\bdb.py", line 49, in trace_dispatch
    return self.dispatch_line(frame)
  File "C:\jython\Lib\bdb.py", line 67, in dispatch_line
    self.user_line(frame)
  File "C:\jython\Lib\pdb.py", line 158, in user_line
    self.interaction(frame, None)
  File "C:\jython\Lib\pdb.py", line 210, in interaction
    self.cmdloop()
  File "C:\jython\Lib\cmd.py", line 142, in cmdloop
    stop = self.onecmd(line)
  File "C:\jython\Lib\pdb.py", line 279, in onecmd
    return cmd.Cmd.onecmd(self, line)
  File "C:\jython\Lib\cmd.py", line 221, in onecmd
    return func(arg)
  File "C:\jython\Lib\pdb.py", line 705, in do_jump
    self.curframe.f_lineno = arg
  File "C:\jython\Lib\pdb.py", line 705, in do_jump
    self.curframe.f_lineno = arg
TypeError: readonly attribute
It seems "jump" command does not work. arg type is integer and this value cannot be set to "self.curframe.f_lineno".
Java version: 1.8 64-bit, Jython versin: 2.7

This functionality only works on Python bytecode - there's no way to do this in Java bytecode. Sorry about that, it's a basic limitation of running on the JVM.