sample with UnitWeights and replace=false throws "no field values" error #950
Description
Using sample with no replacements and unit weights throws an error, seeming to assume the weights object will have values.
I'm trying to sample in a way agnostic to whether FrequencyWeights or UnitWeights are passed.
Minimal reproducible example
using StatsBase
sample(1:5, uweights(5), 3, replace=false)
I would expect this to be equivalent to sample(1:5, 3, replace=false) but instead it throws this error:
ERROR: type UnitWeights has no field values
Stacktrace:
[1] getproperty
@ ./Base.jl:49 [inlined]
[2] efraimidis_aexpj_wsample_norep!(rng::Random.TaskLocalRNG, a::UnitRange{…}, wv::UnitWeights{…}, x::Vector{…}; ordered::Bool)
@ StatsBase ~/.julia/packages/StatsBase/xgoZ5/src/sampling.jl:869
[3] efraimidis_aexpj_wsample_norep!
@ ~/.julia/packages/StatsBase/xgoZ5/src/sampling.jl:848 [inlined]
[4] sample!(rng::Random.TaskLocalRNG, a::UnitRange{…}, wv::UnitWeights{…}, x::Vector{…}; replace::Bool, ordered::Bool)
@ StatsBase ~/.julia/packages/StatsBase/xgoZ5/src/sampling.jl:944
[5] sample!
@ ~/.julia/packages/StatsBase/xgoZ5/src/sampling.jl:918 [inlined]
[6] sample
@ ~/.julia/packages/StatsBase/xgoZ5/src/sampling.jl:952 [inlined]
[7] #sample#220
@ ~/.julia/packages/StatsBase/xgoZ5/src/sampling.jl:955 [inlined]
[8] top-level scope
@ REPL[2]:1
Some type information was truncated. Use `show(err)` to see complete types.
Current workaround
I can condition on typeof the weights variable until there's an internal fix.
Versions
Julia 1.11.3
StatsBase v0.34.4