From 6a453c8bb73c575604389016b8c87c6f8fe25e18 Mon Sep 17 00:00:00 2001
From: Pavel Punegov <pavel.punegov@jetbrains.com>
Date: Sat, 9 Jun 2018 17:25:23 +0300
Subject: [PATCH] toSingletonMap implementation using MutableMap

---
 runtime/src/main/kotlin/kotlin/collections/Maps.kt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/runtime/src/main/kotlin/kotlin/collections/Maps.kt b/runtime/src/main/kotlin/kotlin/collections/Maps.kt
index 98d84e841ac..3950c4353a3 100644
--- a/runtime/src/main/kotlin/kotlin/collections/Maps.kt
+++ b/runtime/src/main/kotlin/kotlin/collections/Maps.kt
@@ -21,4 +21,4 @@ internal inline actual fun <K, V> Map<K, V>.toSingletonMapOrSelf(): Map<K, V> =
 
 // creates a singleton copy of map
 internal actual fun <K, V> Map<out K, V>.toSingletonMap(): Map<K, V>
-        = this.toMutableMap() // TODO
+        = with(entries.iterator().next()) { mutableMapOf(key to value) }