ipython 8.2.0 mixing history from multiple ipython sessions

[segasai]

Hi,

After updating to ipython 8.2.0 I observe a very annoying behaviour, when pressing 'UP_ARROW' in long running ipython session brings not the previous command from history, but a command from some other ipython session running concurrently.

How to reproduce.

• Start ipython session 1
• Start ipython session 2
• Type x=1 in session 1
• Type y=1 in session 2
• Type x=2 in session 1
• Type y=2 in session 2
• Now in session 1 press 'UP_ARROW', and it will bring y=1 instead of x=2

This is very inconvenient behaviour that completely breaks the workflow in long running ipython sessions. I assume it must be a regression.

Thank you.

(I'm using python 3.8 with the latest prompt-toolkit 3.0.29 on linux (ubuntu 18.04)

[segasai]

I have just checked that this was caused by the #13592 as the problem didn't occur before it.

[ljames8]

Hi
I have the exact same issue on macOS 12.1 with python 3.9.10 and prompt-toolkit 3.0.8

[anwarnunez]

This issue is indeed very inconvenient. I'm not sure the current behaviour is ever desirable.

[Carreau]

closed by #13657

[hristog]

I'm still experiencing this issue on: IPython 8.5.0 (and the versions all the way down to 8.2.0, inclusive), and Python 3.8.5.
I've had to downgrade to IPython 8.1.0, in order to have the up-arrow-key history functionality work properly.

[harenbrs]

@hristog Can confirm, seeing the same on IPython 8.5.0:

Python 3.8.6 (default, Nov  9 2020, 16:24:25) 
Type 'copyright', 'credits' or 'license' for more information
IPython 8.5.0 -- An enhanced Interactive Python. Type '?' for help.

In [1]: 42
Out[1]: 42
                                                                                                                                                                            0.013377s
In [2]: %history
42
%history
                                                                                                                                                                            0.000982s
In [3]: X('year').get_previous_start_time(dt)  # up-arrow

[hristog]

Thanks for reproducing and confirming the issue, @harenbrs!

[derVedro]

same with IPython 8.6.0, fixed it by updating old promt_toolkit (3.0.5) to the latest one (3.0.32)