From a3cda9016c48ee19367e7732bdb560b90ef5fe5b Mon Sep 17 00:00:00 2001
From: Roger-luo <hiroger@qq.com>
Date: Thu, 25 Oct 2018 13:48:33 -0400
Subject: [PATCH] apply Mike's change

---
 src/tracker/array.jl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/tracker/array.jl b/src/tracker/array.jl
index f13feb77..9c89b5f6 100644
--- a/src/tracker/array.jl
+++ b/src/tracker/array.jl
@@ -86,9 +86,9 @@ Base.view(x::TrackedArray, inds...) = track(Base.view, x, inds...)
 
 @grad function view(x::AbstractArray, inds...)
     view(data(x), inds...), function (Δ)
-        grad_output = fill!(similar(data(x)), 0)
+        grad_output = zero(x)
         subgrad = view(grad_output, inds...)
-        setindex!(subgrad, Δ, :)
+        subgrad[:] = Δ
         (grad_output, map(_->nothing, inds)...)
     end
 end