From 2d822a5977e5255602df67c7a54b784afa492989 Mon Sep 17 00:00:00 2001
From: "Steven G. Johnson" <stevenj@mit.edu>
Date: Wed, 18 Oct 2017 17:23:54 -0400
Subject: [PATCH] bugfix in collect(A) for zero-dimensional array

Ref #24187
(cherry picked from commit c59b8b184e10805a23ebc1e0702e0199147afbb1)
---
 base/array.jl         | 2 +-
 test/abstractarray.jl | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/base/array.jl b/base/array.jl
index 633dfed5c1469..36625e29f6d20 100644
--- a/base/array.jl
+++ b/base/array.jl
@@ -445,7 +445,7 @@ function _collect(cont, itr, ::HasEltype, isz::SizeUnknown)
     return a
 end
 
-_collect_indices(::Tuple{}, A) = copy!(Vector{eltype(A)}(), A)
+_collect_indices(::Tuple{}, A) = copy!(Array{eltype(A)}(), A)
 _collect_indices(indsA::Tuple{Vararg{OneTo}}, A) =
     copy!(Array{eltype(A)}(length.(indsA)), A)
 function _collect_indices(indsA, A)
diff --git a/test/abstractarray.jl b/test/abstractarray.jl
index 8bad4bb84a6b2..94d301eb58873 100644
--- a/test/abstractarray.jl
+++ b/test/abstractarray.jl
@@ -841,3 +841,8 @@ end
 @testset "checkbounds_indices method ambiguities #20989" begin
     @test Base.checkbounds_indices(Bool, (1:1,), ([CartesianIndex(1)],))
 end
+
+@testset "zero-dimensional copy" begin
+    Z = Array{Int}(); Z[] = 17
+    @test Z == collect(Z) == copy(Z)
+end