Tuning ignores explicit evals parameter

[Ethan-Russell]

I have a mutating function that I am trying to benchmark which requires setup to be run before every function call, or else it will throw an error. I set the evals parameter to 1 thinking that would do the trick. However, I'm finding that tune! will ignore this and run multiple times per setup. Here is a minimum working example:

function myfunc(v)
   isempty(v) || error()
   push!(v,1)
end

julia> @btime myfunc(v) setup=(v=Int[]) evals=1
  0.001 ns (1 allocation: 80 bytes)
1-element Vector{Int64}:
 1

julia> b = @benchmarkable myfunc(v) setup=(v=Int[]) evals=1
Benchmark(evals=1, seconds=5.0, samples=10000)

julia> tune!(b)
ERROR:
Stacktrace:
  [1] error()
    @ Base .\error.jl:42
  [2] myfunc
    @ .\REPL[2]:5 [inlined]
  [3] var"##core#315"(v::Vector{Int64})
    @ Main C:\Users\erussell\.julia\packages\BenchmarkTools\7xSXH\src\execution.jl:489
  [4] var"##sample#316"(::Tuple{}, __params::BenchmarkTools.Parameters)
    @ Main C:\Users\erussell\.julia\packages\BenchmarkTools\7xSXH\src\execution.jl:497
  [5] _lineartrial(b::BenchmarkTools.Benchmark, p::BenchmarkTools.Parameters; maxevals::Int64, kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
    @ BenchmarkTools C:\Users\erussell\.julia\packages\BenchmarkTools\7xSXH\src\execution.jl:161
  [6] _lineartrial(b::BenchmarkTools.Benchmark, p::BenchmarkTools.Parameters)
    @ BenchmarkTools C:\Users\erussell\.julia\packages\BenchmarkTools\7xSXH\src\execution.jl:153
  [7] #invokelatest#2
    @ .\essentials.jl:716 [inlined]
  [8] invokelatest
    @ .\essentials.jl:714 [inlined]
  [9] #lineartrial#46
    @ C:\Users\erussell\.julia\packages\BenchmarkTools\7xSXH\src\execution.jl:35 [inlined]
 [10] lineartrial
    @ C:\Users\erussell\.julia\packages\BenchmarkTools\7xSXH\src\execution.jl:35 [inlined]
 [11] tune!(b::BenchmarkTools.Benchmark, p::BenchmarkTools.Parameters; progressid::Nothing, nleaves::Float64, ndone::Float64, verbose::Bool, pad::String, kwargs::Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
    @ BenchmarkTools C:\Users\erussell\.julia\packages\BenchmarkTools\7xSXH\src\execution.jl:251
 [12] tune! (repeats 2 times)
    @ C:\Users\erussell\.julia\packages\BenchmarkTools\7xSXH\src\execution.jl:250 [inlined]
 [13] top-level scope
    @ REPL[7]:1

[gdalle]

Same issue as #24