fixup! feat(core.utils): also retry read on Windows EACCES (errno 13)

Author: cpcloud

cuda_core/cuda/core/utils/_program_cache.py

@@ -20,6 +20,7 @@
 import abc
 import collections.abc
 import contextlib
+import errno
 import hashlib
 import os
 import pickle
@@ -1110,8 +1111,14 @@ def _stat_and_read_with_sharing_retry(path: Path) -> tuple[os.stat_result, bytes
     transient contention from being mistaken for a real read failure.
 
     Raises ``FileNotFoundError`` on miss or after exhausting the Windows
-    sharing-retry budget. Other ``PermissionError`` (real ACL/permission
-    issues) and any non-Windows ``PermissionError`` propagate.
+    sharing-retry budget. Non-Windows ``PermissionError`` propagates.
+
+    On Windows, EACCES (errno 13) is treated as transient too: ``io.open``
+    sometimes surfaces a pending-delete or share-mode mismatch as bare
+    EACCES with no ``winerror`` attribute, indistinguishable here from
+    a true sharing violation. Real ACL problems on a path the cache owns
+    would surface consistently; the bounded retry budget keeps the cost
+    of treating them as transient negligible.
     """
     last_exc: BaseException | None = None
     for delay in _REPLACE_RETRY_DELAYS:
@@ -1122,7 +1129,10 @@ def _stat_and_read_with_sharing_retry(path: Path) -> tuple[os.stat_result, bytes
         except FileNotFoundError:
             raise
         except PermissionError as exc:
-            if not _IS_WINDOWS or getattr(exc, "winerror", None) not in _SHARING_VIOLATION_WINERRORS:
+            if not _IS_WINDOWS:
+                raise
+            winerror = getattr(exc, "winerror", None)
+            if winerror not in _SHARING_VIOLATION_WINERRORS and exc.errno != errno.EACCES:
                 raise
             last_exc = exc
     raise FileNotFoundError(path) from last_exc