Avoid copy
Avoid copy

wkentaro/chainer,wkentaro/chainer,keisuke-umezawa/chainer,jnishi/chainer,hvy/chainer,hvy/chainer,jnishi/chainer,ktnyt/chainer,niboshi/chainer,jnishi/chainer,ktnyt/chainer,okuta/chainer,wkentaro/chainer,hvy/chainer,niboshi/chainer,keisuke-umezawa/chainer,chainer/chainer,chainer/chainer,chainer/chainer,chainer/chainer,wkentaro/chainer,okuta/chainer,keisuke-umezawa/chainer,niboshi/chainer,jnishi/chainer,keisuke-umezawa/chainer,okuta/chainer,ktnyt/chainer,ktnyt/chainer,okuta/chainer,hvy/chainer,niboshi/chainer,tkerola/chainer,pfnet/chainer