fix: handle closed stdio process during writes

Author: MukundaKatta

src/mcp/client/stdio.py

@@ -174,7 +174,12 @@ async def stdin_writer():
                             errors=server.encoding_error_handler,
                         )
                     )
-        except anyio.ClosedResourceError:  # pragma: no cover
+        except (
+            anyio.BrokenResourceError,
+            anyio.ClosedResourceError,
+            BrokenPipeError,
+            ConnectionResetError,
+        ):  # pragma: no cover
             await anyio.lowlevel.checkpoint()
 
     async with anyio.create_task_group() as tg, process:

src/mcp/server/mcpserver/utilities/schema.py

@@ -63,7 +63,7 @@ def dereference_local_refs(schema: dict[str, Any]) -> dict[str, Any]:
     prefix = f"#/{defs_key}/"
 
     def inline(node: Any, stack: set[str]) -> Any:
-        if node is None or isinstance(node, (str, int, float, bool)):
+        if node is None or isinstance(node, str | int | float | bool):
             return node
         if isinstance(node, list):
             return [inline(item, stack) for item in node]