From a386d767b594bda4f4e6b32494555cfb057fcb3e Mon Sep 17 00:00:00 2001
From: cptpcrd <31829097+cptpcrd@users.noreply.github.com>
Date: Wed, 28 Oct 2020 23:15:53 -0400
Subject: [PATCH] Fix annotations for resource.prlimit() (#4727)

The current annotations specify the `limits` argument as an `Optional[Tuple[int, int]]`; this is incorrect. The real `resource.prlimit()` function does not accept `None` for the `limits` argument; it is only possible to avoid specifying new resource limits by omitting `limits` completely.
---
 stdlib/3/resource.pyi | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/stdlib/3/resource.pyi b/stdlib/3/resource.pyi
index ec963c073..f93f2b747 100644
--- a/stdlib/3/resource.pyi
+++ b/stdlib/3/resource.pyi
@@ -1,5 +1,5 @@
 import sys
-from typing import NamedTuple, Optional, Tuple
+from typing import NamedTuple, Optional, Tuple, overload
 
 RLIMIT_AS: int
 RLIMIT_CORE: int
@@ -47,6 +47,9 @@ def getrusage(__who: int) -> _RUsage: ...
 def setrlimit(__resource: int, __limits: Tuple[int, int]) -> None: ...
 
 if sys.platform == "linux":
-    def prlimit(pid: int, resource: int, limits: Optional[Tuple[int, int]]) -> Tuple[int, int]: ...
+    @overload
+    def prlimit(pid: int, resource: int, limits: Tuple[int, int]) -> Tuple[int, int]: ...
+    @overload
+    def prlimit(pid: int, resource: int) -> Tuple[int, int]: ...
 
 error = OSError