lp-shell ipython instance throws error when typing open parenthesis

[Guruprasad]

I ran the `lp-shell` tool shipped by the `lptools` package in mantic and whenever I type the open parenthesis character, say a statement like `lp.load(`, it shows an exception similar to the one quoted below. Pressing enter to continue drops me to the ipython prompt with just `lp.load` typed and typing `(` causes the issue again.

This issue happens in the version packaged in mantic and the upstream repository at lp:lptools. So this could be due to some change in the ipython3 version.

<snip>
❯ lp-shell
Python 3.11.5 (main, Aug 29 2023, 15:31:31) [GCC 13.2.0]
Type 'copyright', 'credits' or 'license' for more information
IPython 8.14.0 -- An enhanced Interactive Python. Type '?' for help.

Connected to LP service "production" with API version "devel":
Note: LP can be accessed through the "lp" object.

Unhandled exception in event loop:
  File "/usr/lib/python3.11/asyncio/events.py", line 80, in _run
    self._context.run(self._callback, *self._args)
  File "/usr/lib/python3/dist-packages/prompt_toolkit/input/vt100.py", line 162, in callback_wrapper
    callback()
  File "/usr/lib/python3/dist-packages/prompt_toolkit/application/application.py", line 712, in read_from_input_in_context
    context.copy().run(read_from_input)
  File "/usr/lib/python3/dist-packages/prompt_toolkit/application/application.py", line 692, in read_from_input
    self.key_processor.process_keys()
  File "/usr/lib/python3/dist-packages/prompt_toolkit/key_binding/key_processor.py", line 272, in process_keys
    self._process_coroutine.send(key_press)
  File "/usr/lib/python3/dist-packages/prompt_toolkit/key_binding/key_processor.py", line 170, in _process
    matches = self._get_matches(buffer)
              ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/prompt_toolkit/key_binding/key_processor.py", line 128, in _get_matches
    return [b for b in self._bindings.get_bindings_for_keys(keys) if b.filter()]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/prompt_toolkit/key_binding/key_processor.py", line 128, in <listcomp>
    return [b for b in self._bindings.get_bindings_for_keys(keys) if b.filter()]
                                                                     ^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/prompt_toolkit/filters/base.py", line 134, in __call__
    return all(f() for f in self.filters)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/prompt_toolkit/filters/base.py", line 134, in <genexpr>
    return all(f() for f in self.filters)
               ^^^
  File "/usr/lib/python3/dist-packages/prompt_toolkit/filters/base.py", line 248, in __call__
    return self.func()
           ^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/IPython/terminal/shortcuts/filters.py", line 84, in auto_match
    return shell.auto_match
           ^^^^^^^^^^^^^^^^

Exception 'NoneType' object has no attribute 'auto_match'
Press ENTER to continue...
</snip>

ProblemType: Bug
DistroRelease: Ubuntu 23.10
Package: lptools 0.2.0-7ubuntu2
ProcVersionSignature: Ubuntu 6.5.0-5.5-generic 6.5.0
Uname: Linux 6.5.0-5-generic x86_64
ApportVersion: 2.27.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: KDE
Date: Mon Sep 25 18:00:03 2023
InstallationDate: Installed on 2023-09-09 (16 days ago)
InstallationMedia: Kubuntu 23.04 "Lunar Lobster" - Release amd64 (20230414.1)
PackageArchitecture: all
SourcePackage: lptools
UpgradeStatus: Upgraded to mantic on 2023-09-25 (0 days ago)

[Guruprasad (lgp171188)]

This issue appears to be caused by an IPython issue (https://github.com/ipython/ipython/issues/14164) in versions >= 8.10. The fix for this issue has been merged upstream recently via https://github.com/ipython/ipython/pull/14169 but hasn't been backported to the affected versions yet. Applying this patch to the IPython installation on mantic resolves this issue.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Graham Inggs (ginggs)]

This bug was fixed in the package ipython - 8.14.0-2
Sponsored for Guruprasad (lgp171188)

---------------
ipython (8.14.0-2) unstable; urgency=medium

  * Team upload.

  [ L. Guruprasad ]
  * Add upstream patch to fix broken embedding when using
    IPython.terminal.embed.InteractiveShellEmbed. (Closes: #1053223)

 -- Colin Watson <email address hidden> Thu, 05 Oct 2023 00:12:56 +0100