From eaacec852fe6a78f7d77bc38e755e1c7c5b1a0d9 Mon Sep 17 00:00:00 2001
From: JohnnyChen <johnnychen94@hotmail.com>
Date: Tue, 9 Oct 2018 03:40:02 +0800
Subject: [PATCH] Bug fix

---
 src/tracker/scalar.jl | 2 +-
 test/tracker.jl       | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/tracker/scalar.jl b/src/tracker/scalar.jl
index e0ae7db1..ba83d937 100644
--- a/src/tracker/scalar.jl
+++ b/src/tracker/scalar.jl
@@ -23,7 +23,7 @@ end
 
 Base.decompose(x::TrackedReal) = Base.decompose(data(x))
 
-Base.copy(x::TrackedArray) = copy(data(x))
+Base.copy(x::TrackedReal) = copy(data(x))
 
 Base.convert(::Type{T}, x::TrackedReal{S}) where {T<:Real,S} = convert(T, data(x))
 
diff --git a/test/tracker.jl b/test/tracker.jl
index 7d7168ad..a4772f2e 100644
--- a/test/tracker.jl
+++ b/test/tracker.jl
@@ -40,7 +40,7 @@ function promotiontest(f, A, B, C)
   if all(ndims.((A,B,C)) .≤ 2) && f ∈ [hcat, vcat]
     r3 = f(A, B, param(C))
   else
-    @test_broken f(A, B, param(C)) # until julia#20815 is resolved
+    @test_throws MethodError f(A, B, param(C)) # until julia#20815 is resolved
     r3 = r2
   end
   r4 = f(param(A), param(B), param(C))