fixup! test(core.utils): rewriter does one final uncontested write to avoid scheduler-race flake

Author: cpcloud

cuda_core/tests/test_program_cache_multiprocess.py

@@ -121,6 +121,11 @@ def _worker_race_rewriter(root: str, key: bytes, start_event, done_event) -> Non
     atomically replacing the file while the reader keeps loading a
     deliberately-corrupt copy and deciding whether to prune it. The reader
     must never delete the writer's valid record.
+
+    After ``done_event`` fires (set by the caller only after the reader has
+    joined), the rewriter lands one final uncontested write so the test's
+    end-state assertion does not hinge on scheduler-dependent interleaving
+    of the last write vs. the reader's last prune.
     """
     from cuda.core._module import ObjectCode
     from cuda.core.utils import FileStreamProgramCache
@@ -131,6 +136,7 @@ def _worker_race_rewriter(root: str, key: bytes, start_event, done_event) -> Non
         while not done_event.is_set():
             cache[key] = ObjectCode._init(f"good-{i}".encode() * 64, "cubin", name=f"g{i}")
             i += 1
+        cache[key] = ObjectCode._init(b"good-final" * 64, "cubin", name="g-final")
 
 
 def _worker_race_corrupt_reader(root: str, key: bytes, rounds: int, start_event, result_queue) -> None: