From a7fd042e05eda24ecaf51e9a68302b9a3046921a Mon Sep 17 00:00:00 2001
From: Kristoffer Carlsson <kristoffer.carlsson@chalmers.se>
Date: Sun, 25 Jun 2017 11:18:46 -0700
Subject: [PATCH] add test for filtering empty iterator (#22528)

---
 test/iterators.jl | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/test/iterators.jl b/test/iterators.jl
index 5e8e368c33269c..44538ba5058bc4 100644
--- a/test/iterators.jl
+++ b/test/iterators.jl
@@ -406,3 +406,9 @@ end
 @testset "product iterator infinite loop" begin
     @test collect(product(1:1, (1, "2"))) == [(1, 1) (1, "2")]
 end
+
+@testset "filter empty iterable #16704" begin
+    arr = filter(n -> true, 1:0)
+    @test length(arr) == 0
+    @test eltype(arr) == Int
+end