From 4d215e4b55238c9cd5815b9bdac493a723560d14 Mon Sep 17 00:00:00 2001
From: Sebastian Stock <42280794+sostock@users.noreply.github.com>
Date: Thu, 30 Jul 2020 10:23:04 +0200
Subject: [PATCH] Fix allunique(::StepRangeLen)

---
 base/set.jl  | 4 +---
 test/sets.jl | 7 +++++++
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/base/set.jl b/base/set.jl
index afc118edb2526..e8591a1f748e2 100644
--- a/base/set.jl
+++ b/base/set.jl
@@ -393,9 +393,7 @@ end
 
 allunique(::Union{AbstractSet,AbstractDict}) = true
 
-allunique(r::AbstractRange{T}) where {T} = (step(r) != zero(T)) || (length(r) <= 1)
-allunique(r::StepRange{T,S}) where {T,S} = (step(r) != zero(S)) || (length(r) <= 1)
-allunique(r::StepRangeLen{T,R,S}) where {T,R,S} = (step(r) != zero(S)) || (length(r) <= 1)
+allunique(r::AbstractRange) = !iszero(step(r)) || length(r) <= 1
 
 filter!(f, s::Set) = unsafe_filter!(f, s)
 
diff --git a/test/sets.jl b/test/sets.jl
index 3c213b5426c9d..45d1044720843 100644
--- a/test/sets.jl
+++ b/test/sets.jl
@@ -458,6 +458,13 @@ end
     @test allunique(Date(2018, 8, 7):Day(1):Date(2018, 8, 11))  # JuliaCon 2018
     @test allunique(DateTime(2018, 8, 7):Hour(1):DateTime(2018, 8, 11))
     @test allunique(('a':1:'c')[1:2]) == true
+    for r = (Base.OneTo(-1), Base.OneTo(0), Base.OneTo(1), Base.OneTo(5),
+             1:0, 1:1, 1:2, 1:10, 1:.5:.5, 1:.5:1, 1:.5:10, 3:-2:5, 3:-2:3, 3:-2:1,
+             StepRangeLen(1.0, 2.0, 0), StepRangeLen(1.0, 2.0, 2), StepRangeLen(1.0, 2.0, 3),
+             StepRangeLen(1.0, 0.0, 0), StepRangeLen(1.0, -0.0, 1), StepRangeLen(1.0, 0.0, 2),
+             LinRange(1, 2, 3), LinRange(1, 1, 0), LinRange(1, 1, 1), LinRange(1, 1, 10))
+        @test allunique(r) == invoke(allunique, Tuple{Any}, r)
+    end
 end
 @testset "filter(f, ::$S)" for S = (Set, BitSet)
     s = S([1,2,3,4])