From 404feab9510d556c906492f046f907127312137a Mon Sep 17 00:00:00 2001
From: Benjamin Rewis <32186188+benjirewis@users.noreply.github.com>
Date: Fri, 16 Sep 2022 13:38:53 -0400
Subject: [PATCH] GODRIVER-2536 Return early in replaceErrors. (#1076)

---
 mongo/errors.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/mongo/errors.go b/mongo/errors.go
index 33e23573fc..98a260803f 100644
--- a/mongo/errors.go
+++ b/mongo/errors.go
@@ -46,6 +46,11 @@ func (e ErrMapForOrderedArgument) Error() string {
 }
 
 func replaceErrors(err error) error {
+	// Return nil when err is nil to avoid costly reflection logic below.
+	if err == nil {
+		return nil
+	}
+
 	if err == topology.ErrTopologyClosed {
 		return ErrClientDisconnected
 	}