From 891df52ca058d6da074307a0a7c54548b74ac411 Mon Sep 17 00:00:00 2001
From: Kyri Petrou <kyri.petrou@outlook.com>
Date: Thu, 18 Apr 2024 00:42:01 +1000
Subject: [PATCH] Use `FiberRuntime#unsafe.addObserver` for bincompat with v2.1

---
 zio-interop-cats/shared/src/main/scala/zio/interop/cats.scala | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/zio-interop-cats/shared/src/main/scala/zio/interop/cats.scala b/zio-interop-cats/shared/src/main/scala/zio/interop/cats.scala
index ce5edb67..8a5e762c 100644
--- a/zio-interop-cats/shared/src/main/scala/zio/interop/cats.scala
+++ b/zio-interop-cats/shared/src/main/scala/zio/interop/cats.scala
@@ -431,12 +431,12 @@ private abstract class ZioConcurrent[R, E, E1]
       ZIO
         .async[R, E3, C](
           { cb =>
-            leftFiber.addObserver { _ =>
+            leftFiber.unsafe.addObserver { _ =>
               complete(leftFiber, rightFiber, leftWins, raceIndicator, cb)
               ()
             }(Unsafe.unsafe)
 
-            rightFiber.addObserver { _ =>
+            rightFiber.unsafe.addObserver { _ =>
               complete(rightFiber, leftFiber, rightWins, raceIndicator, cb)
               ()
             }(Unsafe.unsafe)