From 46ced86a1ce233195b5919cfbf6fc3606301a6d8 Mon Sep 17 00:00:00 2001
From: Ian Wahbe <ian@wahbe.com>
Date: Thu, 3 Nov 2022 11:34:03 -0700
Subject: [PATCH] Make OutputState pass the `-race` detector

---
 sdk/go/pulumi/types.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sdk/go/pulumi/types.go b/sdk/go/pulumi/types.go
index 4c4b7533a88e..913c164daabd 100644
--- a/sdk/go/pulumi/types.go
+++ b/sdk/go/pulumi/types.go
@@ -129,10 +129,14 @@ func (o *OutputState) elementType() reflect.Type {
 	return o.element
 }
 
+// Fetch the dependencies of an OutputState. It is not thread-safe to mutate values inside
+// returned slice.
 func (o *OutputState) dependencies() []Resource {
 	if o == nil {
 		return nil
 	}
+	o.cond.L.Lock()
+	defer o.cond.L.Unlock()
 	return o.deps
 }