AttributeError when using Pdb in lldb's script interpreter #66356
Description
This was originally reported by LambdaKnight on Discord.
$ ./bin/lldb
(lldb) script
Python Interactive Interpreter. To exit, type 'quit()', 'exit()' or Ctrl-D.
>>> breakpoint()
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/usr/lib/python3.8/pdb.py", line 1610, in set_trace
pdb = Pdb()
File "/usr/lib/python3.8/pdb.py", line 159, in __init__
readline.set_completer_delims(' \t\n`@#$%^&*()=+[{]}\\|;:\'",<>?')
AttributeError: module 'lldb_editline' has no attribute 'set_completer_delims'
I think this is because our readline replacement lldb/source/Plugins/ScriptInterpreter/Python/PythonReadline.cpp is too minimal. It would be great if this could be fixed so we can recommend Pdb as the go to for debugging anything Python related in lldb.
Stubbing out the method is the first step, then figuring out what it's supposed to do.