`choose_group_reps`: reducing over an empty collection is not allowed

MWE

using Knockoffs, LinearAlgebra
Sigma = Symmetric([1.0 0.14138129031570185 -0.07530156753912527 0.1425092255960416 -0.03975762881225776 -0.03975762881225776; 0.14138129031570185 1.0 -0.06269073019504869 0.18796864772097638 -0.042632500750932216 -0.042632500750932216; -0.07530156753912527 -0.06269073019504869 1.0 0.10393405423314547 0.8269051049537056 0.8269051049537056; 0.1425092255960416 0.18796864772097638 0.10393405423314547 1.0 0.1598138853324871 0.1598138853324871; -0.03975762881225776 -0.042632500750932216 0.8269051049537056 0.1598138853324871 1.0 0.9999999999999998; -0.03975762881225776 -0.042632500750932216 0.8269051049537056 0.1598138853324871 0.9999999999999998 1.0])
groups = [1, 2, 3, 4, 3, 3]
choose_group_reps(Sigma, groups, threshold=0.5)

ERROR: MethodError: reducing over an empty collection is not allowed; consider supplying `init` to the reducer
Stacktrace:
  [1] reduce_empty(op::Base.MappingRF{Base.var"#316#317"{…}, Base.BottomRF{…}}, ::Type{Pair{…}})
    @ Base ./reduce.jl:361
  [2] reduce_empty_iter
    @ ./reduce.jl:384 [inlined]
  [3] reduce_empty_iter
    @ ./reduce.jl:383 [inlined]
  [4] foldl_impl
    @ ./reduce.jl:49 [inlined]
  [5] mapfoldl_impl
    @ ./reduce.jl:44 [inlined]
  [6] mapfoldl
    @ ./reduce.jl:175 [inlined]
  [7] _findmax
    @ ./reduce.jl:908 [inlined]
  [8] findmax
    @ ./reducedim.jl:1226 [inlined]
  [9] _findmax
    @ ./reduce.jl:934 [inlined]
 [10] findmax
    @ ./reducedim.jl:1203 [inlined]
 [11] select_one(C::Matrix{Float64}, vlist::Vector{Int64}, RSS0::Int64, tol::Float64)
    @ Knockoffs /home/groups/sabatti/.julia/packages/Knockoffs/fRlxF/src/group.jl:2083
 [12] select_one(C::AbstractMatrix, vlist::Any, RSS0::Any, tol::Any)
    @ Knockoffs /home/groups/sabatti/.julia/packages/Knockoffs/fRlxF/src/group.jl:2081 [inlined]
 [13] select_best_rss_subset(C::SubArray{Float64, 2, Symmetric{…}, Tuple{…}, false}, k::Int64)
    @ Knockoffs /home/groups/sabatti/.julia/packages/Knockoffs/fRlxF/src/group.jl:2099
 [14] choose_group_reps(Σ::Symmetric{…}, groups::Vector{…}; threshold::Float64, prioritize_idx::Nothing, Σinv::Symmetric{…})
    @ Knockoffs /home/groups/sabatti/.julia/packages/Knockoffs/fRlxF/src/group.jl:1998
 [15] top-level scope
    @ REPL[4]:1
Some type information was truncated. Use `show(err)` to see complete types

This is on Julia v1.10 and Knockoffs.jl version v1.1.9

On Knockoffs.jl version v.1.1.10:

Sigma = Symmetric([1.0 0.14138129031570185 -0.07530156753912527 0.1425092255960416 -0.03975762881225776 -0.03975762881225776; 
        0.14138129031570185 1.0 -0.06269073019504869 0.18796864772097638 -0.042632500750932216 -0.042632500750932216; 
        -0.07530156753912527 -0.06269073019504869 1.0 0.10393405423314547 0.8269051049537056 0.8269051049537056; 
        0.1425092255960416 0.18796864772097638 0.10393405423314547 1.0 0.1598138853324871 0.1598138853324871; 
        -0.03975762881225776 -0.042632500750932216 0.8269051049537056 0.1598138853324871 1.0 0.9999999999999998; 
        -0.03975762881225776 -0.042632500750932216 0.8269051049537056 0.1598138853324871 0.9999999999999998 1.0])
groups = [1, 2, 3, 4, 3, 3]

julia> group_reps = choose_group_reps(Sigma, groups, threshold=0.5)
4-element Vector{Int64}:
 1
 2
 4
 5

biona001 / Knockoffs.jl

`choose_group_reps`: reducing over an empty collection is not allowed #71