Crash on copy.copy() of dict value accessed with static key set elsewhere

[jacobtylerwalls]

Bug description

# pylint: disable=missing-module-docstring
# pylint: disable=too-few-public-methods
import copy

class MyData:
    '''
    class docstring
    '''
    def __init__(self):
        self.data = {}

    def process(self):
        '''
        another method is responsible for putting "static_key"
        '''
        copy.copy(self.data['static_key'])



pylint crashed with a ``InferenceError`` and with the following stacktrace:

Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/astroid/inference.py", line 401, in infer_subscript
assigned = value.getitem(index_value, context)
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/astroid/nodes/node_classes.py", line 2252, in getitem
raise AstroidIndexError(index)
astroid.exceptions.AstroidIndexError:

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pylint/lint/pylinter.py", line 1024, in _check_files
self._check_file(
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pylint/lint/pylinter.py", line 1063, in _check_file
check_astroid_module(ast_node)
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pylint/lint/pylinter.py", line 1200, in check_astroid_module
retval = self._check_astroid_module(
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pylint/lint/pylinter.py", line 1245, in _check_astroid_module
walker.walk(ast_node)
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pylint/utils/ast_walker.py", line 78, in walk
self.walk(child)
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pylint/utils/ast_walker.py", line 78, in walk
self.walk(child)
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pylint/utils/ast_walker.py", line 78, in walk
self.walk(child)
[Previous line repeated 1 more time]
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pylint/utils/ast_walker.py", line 75, in walk
callback(astroid)
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pylint/checkers/stdlib.py", line 537, in visit_call
self._check_shallow_copy_environ(node)
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pylint/checkers/stdlib.py", line 488, in _check_shallow_copy_environ
for inferred in arg.inferred():
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/astroid/nodes/node_ng.py", line 465, in inferred
return list(self.infer())
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/astroid/nodes/node_ng.py", line 99, in infer
yield from self._infer(context, **kwargs)
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/astroid/decorators.py", line 136, in raise_if_nothing_inferred
yield next(generator)
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/astroid/decorators.py", line 100, in wrapped
res = next(generator)
File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/astroid/inference.py", line 408, in infer_subscript
raise InferenceError(node=self, context=context) from exc
astroid.exceptions.InferenceError: Inference failed for <Subscript l.16 at 0x7fd870e47400>.

Configuration

No response

Command used

python -m pylint error_report

Pylint output

Exception on node <Call l.16 at 0x7fd870e47520> in file '/Users/.../fifth'
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/astroid/inference.py", line 401, in infer_subscript
    assigned = value.getitem(index_value, context)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/astroid/nodes/node_classes.py", line 2252, in getitem
    raise AstroidIndexError(index)
astroid.exceptions.AstroidIndexError: <unprintable AstroidIndexError object>

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pylint/utils/ast_walker.py", line 75, in walk
    callback(astroid)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pylint/checkers/stdlib.py", line 537, in visit_call
    self._check_shallow_copy_environ(node)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/pylint/checkers/stdlib.py", line 488, in _check_shallow_copy_environ
    for inferred in arg.inferred():
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/astroid/nodes/node_ng.py", line 465, in inferred
    return list(self.infer())
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/astroid/nodes/node_ng.py", line 99, in infer
    yield from self._infer(context, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/astroid/decorators.py", line 136, in raise_if_nothing_inferred
    yield next(generator)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/astroid/decorators.py", line 100, in wrapped
    res = next(generator)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/astroid/inference.py", line 408, in infer_subscript
    raise InferenceError(node=self, context=context) from exc
astroid.exceptions.InferenceError: Inference failed for <Subscript l.16 at 0x7fd870e47400>.
************* Module fifth
fifth:1:0: F0002: fifth: Fatal error while checking 'fifth'. Please open an issue in our bug tracker so we address this. There is a pre-filled template that you can use in '/Users/.../Library/Caches/pylint/pylint-crash-2021-08-21-11.txt'. (astroid-error)

------------------------------------
Your code has been rated at 10.00/10

Expected behavior

no messages

Pylint version

pylint 2.10.1
astroid 2.7.2
Python 3.9.6 (v3.9.6:db3ff76da1, Jun 28 2021, 11:49:53) 
[Clang 6.0 (clang-600.0.57)]

OS / Environment

macOS 11.3.1 as well as Ubuntu 20.04.2 LTS on GitHub Actions

Additional dependencies

n/a

[Pierre-Sassoulas]

Thank you for creating the issue, it's fixed in 2.10.2.