Fix allunique(::StepRangeLen)

Author: sostock

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)
 

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])