From 2461d54d8a48d8abf3a82f75c822729e422f3df7 Mon Sep 17 00:00:00 2001
From: kalmar <kalmar@amu.edu.pl>
Date: Wed, 17 May 2017 12:32:46 +0200
Subject: [PATCH] zeros(T::Type, X::Array) modifies X??

---
 src/GroupRings.jl | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/GroupRings.jl b/src/GroupRings.jl
index e774052..c048048 100644
--- a/src/GroupRings.jl
+++ b/src/GroupRings.jl
@@ -254,8 +254,9 @@ end
 
 function groupring_mult(X::AbstractVector, Y::AbstractVector, pm::Array{Int,2})
    T = promote_type(eltype(X), eltype(Y))
-   result = zeros(T, X)
-   return groupring_mult!(X,Y,pm,result)
+   result = zeros(T, deepcopy(X))
+   groupring_mult!(X, Y, pm, result)
+   return result
 end
 
 function groupring_mult{T<:Number}(X::GroupRingElem{T}, Y::GroupRingElem{T})