False positive for try-except-raise with multiple exceptions catching

[fly]

Bug description

Error is produced when a single except statement catches several exceptions for re-raising and when these exceptions are not in the current namespace.

Example (both Exception1 and Exception2 here are inherited directly from Exception):

from app import errors

def check():
    try:
        return do_something()
    except (errors.Exception1, errors.Exception2):  # The except handler raises immediately (try-except-raise)
        raise
    except Exception as e:
        raise errors.Exception1("Boom!") from e

Note that if I bring exceptions directly into namespace, then it works:

from app.errors import Exception1, Exception2

def check():
    try:
        return do_something()
    except (Exception1, Exception2): 
        raise
    except Exception as e:
        raise Exception1("Boom!") from e

It also works if I use separate except statements for each:

from app import errors

def check():
    try:
        return do_something()
    except errors.Exception1:
        raise
    except errors.Exception2:
        raise
    except Exception as e:
        raise errors.Exception1("Boom!") from e

Configuration

No response

Command used

pylint check.py

Pylint output

************* Module check
check.py:19:4: W0706: The except handler raises immediately (try-except-raise)

Expected behavior

No errors

Pylint version

pylint 2.15.10
astroid 2.13.2
Python 3.9.16 (main, Dec  7 2022, 01:12:08) 
[GCC 11.3.0]

OS / Environment

No response

Additional dependencies

No response

[Pierre-Sassoulas]

Hello, thank you for opening the issue. What is the inheritance tree of errors.Exception1, errors.Exception2 and Exception ?

[fly]

both Exception1 and Exception2 here are inherited directly from Exception. Exception is built in

[Pierre-Sassoulas]

It's indeed a false positive then. We probably need to use inference to handle exception's aliases.