Index: anyio-3.7.1/src/anyio/_backends/_asyncio.py
===================================================================
--- anyio-3.7.1.orig/src/anyio/_backends/_asyncio.py
+++ anyio-3.7.1/src/anyio/_backends/_asyncio.py
@@ -1061,9 +1061,21 @@ def _forcibly_shutdown_process_pool_on_e
     Forcibly shuts down worker processes belonging to this event loop."""
     child_watcher: asyncio.AbstractChildWatcher | None
     try:
-        child_watcher = asyncio.get_event_loop_policy().get_child_watcher()
-    except NotImplementedError:
+        policy = asyncio.get_event_loop_policy()
+        if hasattr(policy, "get_child_watcher"):
+            child_watcher = policy.get_child_watcher()
+    except (AttributeError, NotImplementedError):
         child_watcher = None
+    
+    # If watcher still exists, make remove_child_handler safe
+    def _safe_remove(pid: int) -> None:
+        if not child_watcher:
+            return
+        try:
+            if hasattr(child_watcher, "remove_child_handler"):
+                child_watcher.remove_child_handler(pid)
+        except Exception:
+            pass
 
     # Close as much as possible (w/o async/await) to avoid warnings
     for process in workers:
@@ -1076,6 +1088,7 @@ def _forcibly_shutdown_process_pool_on_e
         process.kill()
         if child_watcher:
             child_watcher.remove_child_handler(process.pid)
+        _safe_remove(process.pid)
 
 
 async def _shutdown_process_pool_on_exit(workers: set[Process]) -> None:
Index: anyio-3.7.1/src/anyio/_core/_fileio.py
===================================================================
--- anyio-3.7.1.orig/src/anyio/_core/_fileio.py
+++ anyio-3.7.1/src/anyio/_core/_fileio.py
@@ -506,7 +506,15 @@ class Path:
         return await to_thread.run_sync(self._path.read_text, encoding, errors)
 
     def relative_to(self, *other: str | PathLike[str]) -> Path:
-        return Path(self._path.relative_to(*other))
+        # Python 3.14 compatibility: pathlib.PurePath.relative_to no longer accepts multiple arguments
+        if len(other) == 1:
+            rel = self._path.relative_to(other[0])
+        else:
+            rel = self._path
+            for p in other:
+                rel = rel.relative_to(p)
+        return Path(rel)
+
 
     async def readlink(self) -> Path:
         target = await to_thread.run_sync(os.readlink, self._path)