From ac0f612781ce5a223dc7e553bdf51e5013c21601 Mon Sep 17 00:00:00 2001
From: Pavel Punegov <pavel.punegov@jetbrains.com>
Date: Tue, 11 Dec 2018 14:53:58 +0300
Subject: [PATCH] Make kotlin.test asserter be ThreadLocal

---
 .../common/src/main/kotlin/kotlin/test/Assertions.kt            | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libraries/kotlin.test/common/src/main/kotlin/kotlin/test/Assertions.kt b/libraries/kotlin.test/common/src/main/kotlin/kotlin/test/Assertions.kt
index 33cf18b0248..f4e6863c806 100644
--- a/libraries/kotlin.test/common/src/main/kotlin/kotlin/test/Assertions.kt
+++ b/libraries/kotlin.test/common/src/main/kotlin/kotlin/test/Assertions.kt
@@ -14,6 +14,7 @@ package kotlin.test
 
 import kotlin.contracts.*
 import kotlin.internal.*
+import kotlin.native.concurrent.ThreadLocal
 import kotlin.reflect.KClass
 
 /**
@@ -23,6 +24,7 @@ val asserter: Asserter
     get() = _asserter ?: lookupAsserter()
 
 /** Used to override current asserter internally */
+@ThreadLocal
 internal var _asserter: Asserter? = null
 
 /** Asserts that the given [block] returns `true`. */