Message 185578 - Python tracker

Here is a backtrace from PDB:

-> self.sync_source_line()
  /Volumes/SecurePython3/cpython/py34/Lib/idlelib/Debugger.py(211)sync_source_line()
-> self.flist.gotofileline(filename, lineno)
  /Volumes/SecurePython3/cpython/py34/Lib/idlelib/FileList.py(46)gotofileline()
-> edit.gotoline(lineno)
> /Volumes/SecurePython3/cpython/py34/Lib/idlelib/EditorWindow.py(694)gotoline()
-> self.center()

The offending code seems to be in EditorWindow.py:gotoline()

    def gotoline(self, lineno):
        if lineno is not None and lineno > 0:
            self.text.mark_set("insert", "%d.0" % lineno)
            self.text.tag_remove("sel", "1.0", "end")
            self.text.tag_add("sel", "insert", "insert +1l")
            self.center()

Next I am going to write a small program to try and reproduce the bug so I can file with the TCL/TK folks.