From 72115c2b0996cd7b33ed0f161d4d1a997caaf1db Mon Sep 17 00:00:00 2001
From: Araq <rumpf_a@web.de>
Date: Fri, 9 Jun 2017 13:39:42 +0200
Subject: [PATCH] fixes #5969

---
 lib/pure/hashes.nim | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/lib/pure/hashes.nim b/lib/pure/hashes.nim
index e8c8776c63..b015ed3115 100644
--- a/lib/pure/hashes.nim
+++ b/lib/pure/hashes.nim
@@ -139,9 +139,14 @@ proc hash*(x: cstring): Hash =
   ## efficient hashing of null-terminated strings
   var h: Hash = 0
   var i = 0
-  while x[i] != 0.char:
-    h = h !& ord(x[i])
-    inc i
+  when defined(js):
+    while i < x.len:
+      h = h !& ord(x[i])
+      inc i
+  else:
+    while x[i] != 0.char:
+      h = h !& ord(x[i])
+      inc i
   result = !$h
 
 proc hash*(sBuf: string, sPos, ePos: int): Hash =