eigs does not work

[chakravala]

Tried out various ways of installing it: (on arch linux)

If I try the current version 0.4:

(v1.3) pkg> st Arpack
    Status `~/.julia/environments/v1.3/Project.toml`
  [7d9fca2a] Arpack v0.4.0

julia> eigs(rand(7,7),nev=3)

signal (11): Segmentation fault
in expression starting at REPL[6]:0
jl_gc_pool_alloc at /usr/bin/../lib/libjulia.so.1 (unknown line)
unknown function (ip: 0x7f029285515b)
unknown function (ip: 0x7f0292601af5)
unknown function (ip: 0x7f02927f556a)
unknown function (ip: 0x7f02927f5954)
unknown function (ip: 0x7f029f1b9c94)
unknown function (ip: 0xffffffffffffffff)
Allocations: 24855719 (Pool: 24849863; Big: 5856); GC: 26
Segmentation fault (core dumped)

This happens regardless, even if I copy libarpack.so.2.0.0 also

If I try v0.3.2

(v1.3) pkg> st Arpack
    Status `~/.julia/environments/v1.3/Project.toml`
  [7d9fca2a] Arpack v0.3.2
  [b99e7846] BinaryProvider v0.5.8

julia> eigs(rand(7,7),nev=3)
ERROR: MethodError: Cannot `convert` an object of type String to an object of type Int32
Closest candidates are:
  convert(::Type{T}, ::T) where T<:Number at number.jl:6
  convert(::Type{T}, ::Number) where T<:Number at number.jl:7
  convert(::Type{T}, ::Ptr) where T<:Integer at pointer.jl:23
  ...
Stacktrace:
 [1] Arpack.ARPACKException(::String) at /home/flow/.julia/packages/Arpack/zCmTA/src/libarpack.jl:8
 [2] aupd_wrapper(::Type, ::Arpack.var"#matvecA!#24"{Array{Float64,2}}, ::Arpack.var"#18#25", ::Arpack.var"#19#26", ::Int64, ::Bool, ::Bool, ::String, ::Int64, ::Int32, ::String, ::Float64, ::Int64, ::Int64, ::Array{Float64,1}) at /home/flow/.julia/packages/Arpack/zCmTA/src/libarpack.jl:82
 [3] #_eigs#17(::Int64, ::Int64, ::Symbol, ::Float64, ::Int64, ::Nothing, ::Array{Float64,1}, ::Bool, ::typeof(Arpack._eigs), ::Array{Float64,2}, ::UniformScaling{Bool}) at /home/flow/.julia/packages/Arpack/zCmTA/src/Arpack.jl:198
 [4] (::Arpack.var"#kw##eigs")(::NamedTuple{(:nev,),Tuple{Int64}}, ::typeof(eigs), ::Array{Float64,2}) at ./none:0
 [5] top-level scope at REPL[18]:1

and if I try the development version

(v1.3) pkg> st Arpack
    Status `~/.julia/environments/v1.3/Project.toml`
  [7d9fca2a] Arpack v0.4.0+ [`~/.julia/dev/Arpack`]
  [b99e7846] BinaryProvider v0.5.8
  [2f01184e] SparseArrays 

julia> eigs(rand(7,7),nev=3)
ERROR: UndefVarError: ARPACKException not defined
Stacktrace:
 [1] aupd_wrapper(::Type, ::Arpack.var"#matvecA!#24"{Array{Float64,2}}, ::Arpack.var"#18#25", ::Arpack.var"#19#26", ::Int64, ::Bool, ::Bool, ::String, ::Int64, ::Int32, ::String, ::Float64, ::Int64, ::Int64, ::Array{Float64,1}) at /home/flow/.julia/dev/Arpack/src/libarpack.jl:60
 [2] #_eigs#17(::Int64, ::Int64, ::Symbol, ::Float64, ::Int64, ::Nothing, ::Array{Float64,1}, ::Bool, ::typeof(Arpack._eigs), ::Array{Float64,2}, ::LinearAlgebra.UniformScaling{Bool}) at /home/flow/.julia/dev/Arpack/src/Arpack.jl:198
 [3] (::Arpack.var"#kw##eigs")(::NamedTuple{(:nev,),Tuple{Int64}}, ::typeof(eigs), ::Array{Float64,2}) at ./none:0
 [4] top-level scope at REPL[2]:1

So how can I get eigs to work?

[rveltz]

it works for me

eigs(rand(7,7),nev=3)
(Complex{Float64}[3.4727904018698945 + 0.0im, -0.8020101029774044 + 0.0im, 0.5736800957314199 + 0.5392424473183904im], Complex{Float64}[-0.3197337420245776 + 0.0im -0.08489443896384236 + 0.0im 0.16427768832375975 - 0.1195716010489416im; -0.2853886328874103 + 0.0im -0.6894324250243941 + 0.0im 0.18371371058594194 + 0.007239725051608956im; … ; -0.4284947349819277 + 0.0im 0.3548716345805274 + 0.0im 0.5142389869777838 + 0.32318975385913257im; -0.43399594983681794 + 0.0im 0.4404875307756231 + 0.0im -0.2913741422660765 - 0.16344354709523568im], 4, 1, 7, [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0])

[andreasnoack]

Tried out various ways of installing it

Please let us know exactly which ways. Did you try the official binaries from julialang.org?

[andreasnoack]

No reply so closing.

[gray-stanton]

I am also an Arch user, and I was having the same segfault issue when using eigs with Julia (1.5.3) installed from the distro repository. Moving the official binaries from julialang.org did fix that! Thanks for the tip, must be something screwy with how pacman is installing it.