From ae417711f623d08e3f0d67d636182cbf66c31ebd Mon Sep 17 00:00:00 2001
From: jpboth <jeanpierre.both@gmail.com>
Date: Sat, 31 Mar 2018 11:16:43 +0200
Subject: [PATCH] Update valuevec.rs

I ran  into an overflow with bits_per_val = 32
---
 src/valuevec.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/valuevec.rs b/src/valuevec.rs
index 7a19b9d..b64232d 100644
--- a/src/valuevec.rs
+++ b/src/valuevec.rs
@@ -34,7 +34,8 @@ impl ValueVec {
         let bits = bits_per_val*count;
         ValueVec {
             bits_per_val: bits_per_val,
-            mask: 2u32.pow(bits_per_val as u32)-1,
+            // to avoid overflow in case bits_per_val equals 32
+            mask: if bits_per_val < 32 {2u32.pow(bits_per_val as u32)-1} else { 0xFFFFFFFF} ,
             bits: BitVec::from_elem(bits,false),
         }
     }