[Ray Debugger]: up arrow doesn't recall last command

[zcarrico-fn]

What happened + What you expected to happen

When using Ray's debugger, using the up arrow key in a pdb session does not recall the last command as it would in a normal pdb session. Pressing the up arrow results in ^[[A appearing. Example:

(Pdb) print("test")
test
(Pdb) ^[[A
*** SyntaxError: invalid syntax

Versions / Dependencies

Ray2.9.0 Python3.10 Debian GNU/Linux 11 (bullseye)

Reproduction script

save the below as tmp.py

import ray
@ray.remote
def f(x):
    breakpoint()
    return x
ray.get(f.remote(1))

1. Execute python tmp.py.
2. In a separate terminal enter the pdb session using ray debug.
3. Type 0, then enter.
4. Type print(x), enter
5. Press the up arrow. It will show ^[[A rather than print(x)

Issue Severity

Low: It annoys or frustrates me.

[scottsun94]

@rkooo567 not sure if you know this. Is this something easy to fix?

[rkooo567]

Core team doesn't maintain this feature now. @brycehuang30 do you happen to know?