diff --git a/src/commonMain/kotlin/ru/landgrafhomyak/utility/highlevel_try_finally/safe_autoclose.kt b/src/commonMain/kotlin/ru/landgrafhomyak/utility/highlevel_try_finally/safe_autoclose.kt
index 54f9208..6d6ed32 100644
--- a/src/commonMain/kotlin/ru/landgrafhomyak/utility/highlevel_try_finally/safe_autoclose.kt
+++ b/src/commonMain/kotlin/ru/landgrafhomyak/utility/highlevel_try_finally/safe_autoclose.kt
@@ -1,18 +1,16 @@
 package ru.landgrafhomyak.utility.highlevel_try_finally
 
-import kotlin.contracts.InvocationKind
-import kotlin.contracts.contract
-
-inline fun <R> safeAutoClose(onError: () -> Unit = {}, onSuccess: () -> Unit = {}, action: () -> R): R {
-	contract {
-		callsInPlace(action, InvocationKind.EXACTLY_ONCE)
-		callsInPlace(onError, InvocationKind.AT_MOST_ONCE)
-		callsInPlace(onSuccess, InvocationKind.EXACTLY_ONCE)
-	}
+fun <R> safeAutoClose(
+	onError: () -> Unit = {},
+	onSuccess: () -> Unit = {},
+	action: () -> R
+): R {
 	val ret: R
 	var wasError = false
+	var crossReturned = true
 	try {
 		ret = action()
+		crossReturned = false
 	} catch (e1: Throwable) {
 		wasError = true
 		try {
@@ -22,8 +20,11 @@ inline fun <R> safeAutoClose(onError: () -> Unit = {}, onSuccess: () -> Unit = {
 		}
 		throw e1
 	} finally {
-		if (!wasError)
+		if (!wasError) {
+			if (crossReturned)
+				throw Error("crossreturn")
 			onSuccess()
+		}
 	}
 	return ret
-}
\ No newline at end of file
+}