Memory leak if `math.dist` raises exception

[kumaraditya303]

Reproducer:

import math
try:
    math.dist([1, 2], [3, 4, 5])
except ValueError:
    pass

Memory leak:

@kumaraditya303 ➜ /workspaces/cpython (main ✗) $ ./python -X showrefcount main.py 
[7 refs, 2 blocks]

Python Version: main at 9bdec0a

• PR: GH-98897: fix memory leak if math.dist raises exception #98898

• PR: [3.11] GH-98897: fix memory leak if math.dist raises exception (GH-98898) #98941

• PR: [3.10] GH-98897: fix memory leak if math.dist raises exception (GH-98898) #98942

[vstinner]

I'm glad that ./python -X showrefcount can now be used to detect memory leaks at exit :-) https://mail.python.org/archives/list/python-dev@python.org/thread/E4C6TDNVDPDNNP73HTGHN5W42LGAE22F/

[vstinner]

Do you want to propose a fix?