unnecessary-ellipsis checker: AstroidError with list in dict (Could not find list in dict's children)

[The-Compiler]

Bug description

# pylint: disable=missing-module-docstring
x = {'a': [...]}

leads to an AstroidError.

I bisected this to 78eed6a, part of #5470 ("New checker - Detect use of unnecessary ellipsis").

Configuration

No response

Command used

pylint repro3.py

Pylint output

Exception on node <Const.Ellipsis l.2 at 0x7fb5c8bd45e0> in file '/home/florian/proj/pylint/repro3.py'
Traceback (most recent call last):
  File "/home/florian/proj/pylint/pylint/pylint/utils/ast_walker.py", line 72, in walk
    callback(astroid)
  File "/home/florian/proj/pylint/pylint/pylint/checkers/ellipsis_checker.py", line 38, in visit_const
    len(node.parent.parent.child_sequence(node.parent)) > 1
  File "/home/florian/proj/pylint/astroid/astroid/nodes/node_ng.py", line 397, in child_sequence
    raise AstroidError(msg % (repr(child), repr(self)))
astroid.exceptions.AstroidError: Could not find <List.list l.2 at 0x7fb5c8bd4580> in <Dict.dict l.2 at 0x7fb5c8bd77c0>'s children
************* Module repro3
repro3.py:1:0: F0002: repro3.py: Fatal error while checking 'repro3.py'. Please open an issue in our bug tracker so we address this. [...]

Expected behavior

No crash, and probably no error either.

Pylint version

pylint 2.13.2
astroid 2.11.2
Python 3.8.12 (default, Mar  3 2022, 18:19:28) 
[GCC 11.2.0]

(environment in which I originally encountered the bug - output above is from a git install of both astroid and pylint)

OS / Environment

Archlinux

Additional dependencies

No response