julia> Pkg.add("CLArrays")
Resolving package versions...
ERROR: Unsatisfiable requirements detected for package Sugar [e18849f4]:
Sugar [e18849f4] log:
├─possible versions are: [0.0.1-0.0.3, 0.1.0, 0.2.0, 0.3.0-0.3.1, 0.4.0-0.4.5] or uninstalled
├─restricted by julia compatibility requirements to versions: uninstalled
└─restricted by compatibility requirements with CLArrays [236a7b2a] to versions: 0.4.1-0.4.5 — no versions left
└─CLArrays [236a7b2a] log:
├─possible versions are: 0.1.0-0.1.3 or uninstalled
└─restricted to versions * by an explicit requirement, leaving only versions 0.1.0-0.1.3
Stacktrace:
[1] #propagate_constraints!#61(::Bool, ::Function, ::Pkg.GraphType.Graph, ::Set{Int64}) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\GraphType.jl:1007
[2] propagate_constraints! at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\GraphType.jl:948 [inlined]
[3] #simplify_graph!#121(::Bool, ::Function, ::Pkg.GraphType.Graph, ::Set{Int64}) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\GraphType.jl:1462
[4] simplify_graph! at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\GraphType.jl:1462 [inlined]
[5] resolve_versions!(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}, ::Nothing) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\Operations.jl:371
[6] resolve_versions! at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\Operations.jl:315 [inlined]
[7] #add_or_develop#63(::Array{Base.UUID,1}, ::Symbol, ::Function, ::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\Operations.jl:1172
[8] #add_or_develop at .\none:0 [inlined]
[9] #add_or_develop#17(::Symbol, ::Bool, ::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}, ::Function, ::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\API.jl:59
[10] #add_or_develop at .\none:0 [inlined]
[11] #add_or_develop#16 at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\API.jl:36 [inlined]
[12] #add_or_develop at .\none:0 [inlined]
[13] #add_or_develop#13 at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\API.jl:34 [inlined]
[14] #add_or_develop at .\none:0 [inlined]
[15] #add_or_develop#12(::Base.Iterators.Pairs{Symbol,Symbol,Tuple{Symbol},NamedTuple{(:mode,),Tuple{Symbol}}}, ::Function, ::String) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\API.jl:33
[16] #add_or_develop at .\none:0 [inlined]
[17] #add#22 at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\API.jl:64 [inlined]
[18] add(::String) at C:\cygwin\home\Administrator\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.1\Pkg\src\API.jl:64
[19] top-level scope at none:0
I am using
Version 1.1.1 (2019-05-16)