Mark reified assertFailsWith with InlineOnly to preserve stack traces.

libraries/kotlin.test/shared/src/main/kotlin.jvm/kotlin/test/TestAssertionsJVM.kt

@@ -28,6 +28,7 @@ fun <T : Throwable> assertFailsWith(exceptionClass: KClass<T>, message: String?,
 /** Asserts that a [block] fails with a specific exception of type [T] being thrown.
  *  Since inline method doesn't allow to trace where it was invoked, it is required to pass a [message] to distinguish this method call from others.
  */
+@kotlin.internal.InlineOnly
 inline fun <reified T : Throwable> assertFailsWith(message: String? = null, noinline block: () -> Unit): T = assertFailsWith(T::class, message, block)
 
 

libraries/kotlin.test/shared/src/main/kotlin/kotlin/internal/internalAnnotations.kt

@@ -8,3 +8,9 @@ package kotlin.internal
 @Retention(AnnotationRetention.BINARY)
 internal annotation class OnlyInputTypes
 
+/**
+ * Specifies that this function should not be called directly without inlining
+ */
+@Target(AnnotationTarget.FUNCTION)
+@Retention(AnnotationRetention.BINARY)
+internal annotation class InlineOnly