sparsify function error

[RaniaSalama]

I am trying to use Laplacians.jl sparsify function on a Laplacian matrix (L = I - A D^{-1}), but I get an error.
The code to reproduce the error is below:

using Laplacians

n = 10

A = triu(rand(n, n))

A = A + A'

A = A - diagm(diag(A))

A = sparse(A)

d = sum(A, 2)

x = find(d)

pinvD = sparse(x, x, 1.0./d[x])

L = speye(n, n) - A * pinvD

sparsify(L)

The error message is:
WARNING: The matrix should not have any nonzero diagonal entries.
ERROR: BoundsError: attempt to access 10-element Array{Laplacians.ApproxCholPQElem{Int64},1} at index [123919728]
Stacktrace:
[1] approxCholPQDec!(::Laplacians.ApproxCholPQ{Int64}, ::Int64) at C:\Users\Rania Ibrahim.julia\v0.6\Laplacians\src\approxChol.jl:1253
[2] approxChol(::Laplacians.LLmatp{Int64,Float64}) at C:\Users\Rania Ibrahim.julia\v0.6\Laplacians\src\approxChol.jl:541
[3] #approxCholLapGreedy#189(::Float64, ::Int64, ::Float64, ::Bool, ::Array{Int64,1}, ::Laplacians.ApproxCholParams, ::Function, ::SparseMatrixCSC{Float64,Int64}) at C:\Users\Rania Ibrahim.julia\v0.6\Laplacians\src\approxChol.jl:782
[4] (::Laplacians.#kw##approxCholLapGreedy)(::Array{Any,1}, ::Laplacians.#approxCholLapGreedy, ::SparseMatrixCSC{Float64,Int64}) at .<missing>:0
[5] #approxCholLap1#205(::Float64, ::Int64, ::Float64, ::Bool, ::Array{Int64,1}, ::Laplacians.ApproxCholParams, ::Function, ::SparseMatrixCSC{Float64,Int64}) at C:\Users\Rania Ibrahim.julia\v0.6\Laplacians\src\approxChol.jl:903
[6] (::Laplacians.#kw##approxCholLap1)(::Array{Any,1}, ::Laplacians.#approxCholLap1, ::SparseMatrixCSC{Float64,Int64}) at .<missing>:0
[7] #lapWrapComponents#113(::Float64, ::Int64, ::Float64, ::Bool, ::Array{Int64,1}, ::Array{Any,1}, ::Function, ::Function, ::SparseMatrixCSC{Float64,Int64}) at C:\Users\Rania Ibrahim.julia\v0.6\Laplacians\src\solverInterface.jl:221
[8] (::Laplacians.#kw##lapWrapComponents)(::Array{Any,1}, ::Laplacians.#lapWrapComponents, ::Function, ::SparseMatrixCSC{Float64,Int64}) at .<missing>:0
[9] (::Laplacians.#kw##approxCholLap)(::Array{Any,1}, ::Laplacians.#approxCholLap, ::SparseMatrixCSC{Float64,Int64}) at .<missing>:0
[10] #sparsify#267(::Float64, ::Float64, ::Float64, ::Function, ::SparseMatrixCSC{Float64,Int64}) at C:\Users\Rania Ibrahim.julia\v0.6\Laplacians\src\sparsify.jl:21
[11] sparsify(::SparseMatrixCSC{Float64,Int64}) at C:\Users\Rania Ibrahim.julia\v0.6\Laplacians\src\sparsify.jl:17

[danspielman]

Sparsify wants the adjacency matrix of the graph as input, not the Laplacian.