From 6ce6883fad6a31f92f71fe271c3b2c82a17d0562 Mon Sep 17 00:00:00 2001
From: Daniil Yarancev <21169548+Yardanico@users.noreply.github.com>
Date: Sat, 2 Sep 2017 22:23:00 +0300
Subject: [PATCH] Fix #4366 (#6290)

---
 lib/pure/collections/tables.nim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/pure/collections/tables.nim b/lib/pure/collections/tables.nim
index 2d5a0cecf3..01a42efab4 100644
--- a/lib/pure/collections/tables.nim
+++ b/lib/pure/collections/tables.nim
@@ -939,7 +939,7 @@ proc enlarge[A](t: var CountTable[A]) =
 
 proc `[]=`*[A](t: var CountTable[A], key: A, val: int) =
   ## puts a (key, value)-pair into `t`.
-  assert val > 0
+  assert val >= 0
   var h = rawGet(t, key)
   if h >= 0:
     t.data[h].val = val