From a71f99670c5bb0428a64f0eb1efa3ef3d1eddc26 Mon Sep 17 00:00:00 2001
From: kalmar <kalmar@amu.edu.pl>
Date: Tue, 8 Aug 2017 19:15:55 +0200
Subject: [PATCH] deepcopy S to avoid external changes

---
 src/Groups.jl | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/Groups.jl b/src/Groups.jl
index af2e929..1983a3d 100644
--- a/src/Groups.jl
+++ b/src/Groups.jl
@@ -395,6 +395,7 @@ end
 
 function generate_balls{T<:GroupElem}(S::Vector{T}, Id::T; radius=2, op=*)
     sizes = Vector{Int}()
+    S = deepcopy(S)
     S = unshift!(S, Id)
     B = [Id]
     for i in 1:radius