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gh-106739: Add rtype_cache to warnings.warn message when leaked objects found (#106740)

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Adding the `rtype_cache` to the `warnings.warn` message improves the
previous, somewhat vague message from

```
/Users/username/cpython/Lib/multiprocessing/resource_tracker.py:224: UserWarning: resource_tracker: There appear to be 6 leaked semaphore objects to clean up at shutdown
```

to

```
/Users/username/cpython/Lib/multiprocessing/resource_tracker.py:224: UserWarning: resource_tracker: There appear to be 6 leaked semaphore objects to clean up at shutdown: {'/mp-yor5cvj8', '/mp-10jx8eqr', '/mp-eobsx9tt', '/mp-0lml23vl', '/mp-9dgtsa_m', '/mp-frntyv4s'}
```

---------

Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
This commit is contained in:
shailshouryya 2023-07-25 10:27:36 -07:00 • committed by GitHub
parent 188000ae4b
commit fabcbe9c12
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2 changed files with 5 additions and 3 deletions
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7
Lib/multiprocessing/resource_tracker.py
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@ -221,9 +221,10 @@ def main(fd):
for rtype, rtype_cache in cache.items():
if rtype_cache:
try:
warnings.warn('resource_tracker: There appear to be %d '
'leaked %s objects to clean up at shutdown' %
(len(rtype_cache), rtype))
warnings.warn(
f'resource_tracker: There appear to be {len(rtype_cache)} '
f'leaked {rtype} objects to clean up at shutdown: {rtype_cache}'
)
except Exception:
pass
for name in rtype_cache: