I ran across the following bug in Julia 1.5.0-beta1.0 in diff() when the input is of type UnitRange. The output is also very weird for StepRangeLen inputs. My understanding is that UnitRange is an AbstractArray type. I tested with Julia 1.1.0 and Julia 1.6.0-DEV, both work flawlessly. Is this a bug with diff()? or something else?
_ _ _(_)_ | Documentation: https://docs.julialang.org
(_) | (_) (_) |
_ _ _| |_ __ _ | Type "?" for help, "]?" for Pkg help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 1.5.0-beta1.0 (2020-05-28)
_/ |\__'_|_|_|\__'_| | Official https://julialang.org/ release
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julia> diff(0:4)
ERROR: ArgumentError: step cannot be zero
Stacktrace:
[1] steprange_last(::Int64, ::Int64, ::Int64) at .\range.jl:215
[2] StepRange at .\range.jl:205 [inlined]
[3] _rangestyle at .\range.jl:118 [inlined]
[4] _range at .\range.jl:116 [inlined]
[5] #range#43 at .\range.jl:91 [inlined]
[6] -(::UnitRange{Int64}, ::UnitRange{Int64}) at .\range.jl:1044
[7] broadcasted at .\broadcast.jl:1081 [inlined]
[8] broadcasted at .\broadcast.jl:1263 [inlined]
[9] diff(::UnitRange{Int64}; dims::Int64) at .\multidimensional.jl:849
[10] diff(::UnitRange{Int64}) at .\multidimensional.jl:809
[11] top-level scope at REPL[1]:1
julia> diff(0.0:4)
1.0:0.0:1.0
This is the output in Julia 1.6.0-DEV:
_ _ _(_)_ | Documentation: https://docs.julialang.org
(_) | (_) (_) |
_ _ _| |_ __ _ | Type "?" for help, "]?" for Pkg help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 1.6.0-DEV.281 (2020-06-20)
_/ |\__'_|_|_|\__'_| | Commit f6d34c3c32 (3 days old master)
|__/ |
julia> diff(0:4)
4-element Array{Int64,1}:
1
1
1
1
julia> diff(0.0:4)
4-element Array{Float64,1}:
1.0
1.0
1.0
1.0