False positive exception-escape

[r3m0t]

Steps to reproduce

def foo():
    savedex = []
    try:
        print(1/0)
    except Exception as ex:
        savedex = [str(ex)]
    try:
        print(1/0)
    except Exception as easd:
        savedex = [str(easd)]
    print(repr([ex+'!' for ex in savedex]))
    print(easd)

Current behavior

> pylint --py3k Documents\eg.py
************* Module eg
Documents\eg.py:4:14: W1619: division w/o __future__ statement (old-division)
Documents\eg.py:11:16: W1661: Using an exception object that was bound by an except handler (exception-escape)
Documents\eg.py:8:14: W1619: division w/o __future__ statement (old-division)
Documents\eg.py:12:10: W1661: Using an exception object that was bound by an except handler (exception-escape)

Expected behavior

No exception-escape messages in output

pylint --version output

pylint 2.6.0
astroid 2.4.2
Python 3.8.3 (default, Jul  2 2020, 17:30:36) [MSC v.1916 64 bit (AMD64)]

[hippo91]

@r3m0t thanks for this report.
I'm unable to reproduce it. For example linting the following code:

#pylint:disable=missing-module-docstring, missing-function-docstring
#pylint:disable=blacklisted-name
def foo():
    savedex = []
    try:
        print(1/0)
    except Exception as ex:
        savedex = [str(ex)]
    try:
        print(1/0)
    except Exception as easd:
        savedex = [str(easd)]
    print(repr([ex+'!' for ex in savedex]))
    print(easd)

gives:

************* Module bug_pylint_3928
bug_pylint_3928.py:7:11: W0703: Catching too general exception Exception (broad-except)
bug_pylint_3928.py:11:11: W0703: Catching too general exception Exception (broad-except)

-------------------------------------------------------------------
Your code has been rated at 8.33/10 (previous run: 10.00/10, -1.67)

Adding the option --py3k gives no messages at all.

pylint --version
pylint 2.6.0
astroid 2.4.3
Python 3.8.2 (default, Sep 28 2020, 21:24:28) 
[GCC 8.3.0]

[PCManticore]

I can reproduce this with the following version and with --py3k:

pylint 2.6.1-dev1
astroid 2.5.0
Python 3.6.7 (default, Feb  4 2019, 13:16:09)
[GCC 4.2.1 Compatible Apple LLVM 8.1.0 (clang-802.0.42)]

************* Module a
a.py:4:14: W1619: division w/o __future__ statement (old-division)
a.py:11:16: W1661: Using an exception object that was bound by an except handler (exception-escape)
a.py:8:14: W1619: division w/o __future__ statement (old-division)
a.py:12:10: W1661: Using an exception object that was bound by an except handler (exception-escape)

------------------------------------------------------------------
Your code has been rated at 6.67/10 (previous run: 6.67/10, +0.00)

[Pierre-Sassoulas]

Won't do, we removed the python3 porting mode in 2.11.