From d5064fa2b2bd98fa955e95eef0cf8b11d0aad341 Mon Sep 17 00:00:00 2001
From: Eugen Wissner <belka@caraus.de>
Date: Sat, 7 Apr 2018 19:20:08 +0200
Subject: [PATCH] Add missing tail isn't null assertion

---
 source/tanya/container/list.d | 1 +
 1 file changed, 1 insertion(+)

diff --git a/source/tanya/container/list.d b/source/tanya/container/list.d
index fe62b5f..cb3115f 100644
--- a/source/tanya/container/list.d
+++ b/source/tanya/container/list.d
@@ -925,6 +925,7 @@ struct DRange(L)
     invariant
     {
         assert(this.head !is null);
+        assert(this.tail !is null);
     }
 
     private this(ref EntryPointer head, ref EntryPointer tail) @trusted