Bug report

Bug description:

Bug report

Bug description:

Parent issue ：#146102
Glist:https://gist.github.com/devdanzin/332a120e4c7750e8a7aff47419311696

Two analogous bugs:

1. hamt_node_bitmap_assoc (line 704): Recursive hamt_node_assoc returns new sub_node, then hamt_node_bitmap_clone fails → sub_node leaked. Line 755 correctly DECREFs.
2. hamt_node_bitmap_without (line 997): Same pattern. Line 968 correctly DECREFs.

Fix:

Add Py_DECREF(sub_node) before return NULL/return W_ERROR

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

• gh-150178: Fix refcount leaks in hamt allocation failure paths #150179
• [3.13] gh-150178: Fix refcount leaks in hamt allocation failure paths (GH-150179) #150301
• [3.15] gh-150178: Fix refcount leaks in hamt allocation failure paths (GH-150179) #150303
• [3.14] gh-150178: Fix refcount leaks in hamt allocation failure paths (GH-150179) #150302