WARNING: Method definition ^(IntervalArithmetic.Interval{Float64}, Base.Rational{T} where T<:Integer) in module IntervalArithmetic at /home/twan/.julia/packages/IntervalArithmetic/9q80F/src/intervals/functions.jl:10 overwritten in module IntervalContractors at /home/twan/.julia/packages/IntervalContractors/EI2Tp/src/arithmetic.jl:4.
https://github.com/JuliaIntervals/IntervalContractors.jl/blob/f03cadd14b6a54fb94598df6cc7ad447e5507f77/src/arithmetic.jl#L4
is causing
for me with IntervalArithmetic 0.15.2.