Tests are failing on Julia 1.3 and nightly

[DilumAluthge]

The test failure is on line 27 of runtests.jl.

The issue seems to be that in Julia 1.2 and earlier, test has 4 callsites (regardless of the value of optimize). However, in Julia 1.3, test has 5 callsites if optimize is true and 4 callsites if optimize is false.

The extra call is to Random.default_rng.

julia> callsites = find_callsites_by_ftt(test, Tuple{})
4-element Array{Cthulhu.Callsite,1}:
 %12  = invoke dsfmt_fill_array_close1_open2!(…,…,…)::Nothing
 %35  = invoke rand(::Union{Type{Float64}, Type{Int64}},::Int64)
 %70  = invoke mapreduce_impl(…,…,…,…,…,…)::Float64
 %115  = invoke mapreduce_impl(…,…,…,…,…,…)::Int64

julia> callsites = find_callsites_by_ftt(test, Tuple{}; optimize=false)
4-element Array{Cthulhu.Callsite,1}:
 %2  = invoke rand()::Float64
 %3  = invoke >(::Float64,::Float64)::Bool
 %9  = invoke rand(::Union{Type{Float64}, Type{Int64}},::Int64)
 %10  = invoke sum(::Union{Array{Float64,1}, Array{Int64,1}})

On Julia 1.3

5-element Array{Cthulhu.Callsite,1}:
 %4  = invoke default_rng(::Int64)::Random.MersenneTwister
 %15  = invoke dsfmt_fill_array_close1_open2!(…,…,…)::Nothing
 %38  = invoke rand(::Union{Type{Float64}, Type{Int64}},::Int64)
 %73  = invoke mapreduce_impl(…,…,…,…,…,…)::Float64
 %118  = invoke mapreduce_impl(…,…,…,…,…,…)::Int64

julia> callsites = find_callsites_by_ftt(test, Tuple{}; optimize=false)
4-element Array{Cthulhu.Callsite,1}:
 %2  = invoke rand()::Float64
 %3  = invoke >(::Float64,::Float64)::Bool
 %9  = invoke rand(::Union{Type{Float64}, Type{Int64}},::Int64)
 %10  = invoke sum(::Union{Array{Float64,1}, Array{Int64,1}})