Add Misc/NEWS.d entry for gh-149728

Author: SwayamInSync

Misc/NEWS.d/next/Library/2026-05-12-22-00-00.gh-issue-149728.LzyImp.rst

@@ -0,0 +1,7 @@
+Fix a race in :mod:`importlib._bootstrap` where the fast path in
+``_find_and_load`` could return a module whose ``parent.child`` attribute had
+not yet been set. Under free-threaded CPython this caused packages using the
+lazy-submodule ``__getattr__`` pattern (e.g. NumPy) to recurse to
+:exc:`RecursionError` when multiple threads first-touched the same lazy
+submodule concurrently. ``spec._initializing`` is now kept ``True`` until
+after ``_find_and_load_unlocked`` has attached the module to its parent.