ERROR: ArgumentError: Uniform: the condition a < b is not satisfied.

[PharmCat]

Is it my fault or issue?

L = UpperTriangular(rand(100, 100))
v = L*L'
m = zeros(100)
dist = MvNormal(m, v)
# need try one more time if error

vegas(x -> pdf(dist, x), zeros(100), ones(100))

ERROR: ArgumentError: Uniform: the condition a < b is not satisfied.
Stacktrace:
 [1] #449
   @ C:\Users\q\.julia\packages\Distributions\Ufrz2\src\univariate\continuous\uniform.jl:33 [inlined]
 [2] check_args
   @ C:\Users\q\.julia\packages\Distributions\Ufrz2\src\utils.jl:89 [inlined]
 [3] #Uniform#448
   @ C:\Users\q\.julia\packages\Distributions\Ufrz2\src\univariate\continuous\uniform.jl:33 [inlined]
 [4] #Uniform#451
   @ C:\Users\q\.julia\packages\Distributions\Ufrz2\src\univariate\continuous\uniform.jl:37 [inlined]
 [5] Uniform
   @ C:\Users\q\.julia\packages\Distributions\Ufrz2\src\univariate\continuous\uniform.jl:37 [inlined]
 [6] generate_pts(grid::Matrix{Float64}, cgrid::Matrix{Float64}, M::Int64, a::Vector{Float64}, b::Vector{Float64})
   @ MonteCarloIntegration C:\Users\q\.julia\packages\MonteCarloIntegration\3YHLH\src\vegas.jl:221
 [7] vegas(func::var"#13#14", a::Vector{Float64}, b::Vector{Float64}; maxiter::Int64, nbins::Int64, ncalls::Int64, rtol::Float64, atol::Float64, debug::Bool, batch::Bool)  
   @ MonteCarloIntegration C:\Users\q\.julia\packages\MonteCarloIntegration\3YHLH\src\vegas.jl:92
 [8] vegas(func::Function, a::Vector{Float64}, b::Vector{Float64})
   @ MonteCarloIntegration C:\Users\q\.julia\packages\MonteCarloIntegration\3YHLH\src\vegas.jl:54
 [9] top-level scope
   @ g:\Cloud\Julia\!justtest.jl:734