False positive F821 and F841 for an exception object inside a lambda function #14521
Closed as not planned
Description
Hello, when I run ruff on this code sample, I get F821 and F841 errors:
try:
raise Exception("test")
except Exception as e:
print((lambda: e)())
This is the exact output of the ruff check sample.py command (using the current ruff version, i.e. 0.7.4):
sample.py:3:21: F841 [*] Local variable `e` is assigned to but never used
|
1 | try:
2 | raise Exception("test")
3 | except Exception as e:
| ^ F841
4 | print((lambda: e)())
|
= help: Remove assignment to unused variable `e`
sample.py:4:20: F821 Undefined name `e`
|
2 | raise Exception("test")
3 | except Exception as e:
4 | print((lambda: e)())
| ^ F821
|
Found 2 errors.
[*] 1 fixable with the `--fix` option.
I believe that this is a false positive, as this code runs fine on cPython 3.9. It prints "test".