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[ Info: Precompiling Hadamard [4a05ff16-5f95-55f4-bb53-bb3f467c689a]
ERROR: LoadError: MethodError: no method matching occursin(::String, ::Base.RefValue{String})
Closest candidates are:
  occursin(::Union{AbstractChar, AbstractString}, ::AbstractString) at strings/search.jl:621
  occursin(::Any) at strings/search.jl:635
Stacktrace:
 [1] top-level scope
   @ ~/.julia/packages/Hadamard/3fngh/src/Hadamard.jl:65
 [2] include
   @ ./Base.jl:386 [inlined]
 [3] include_package_for_output(pkg::Base.PkgId, input::String, depot_path::Vector{String}, dl_load_path::Vector{String}, load_path::Vector{String}, concrete_deps::Vector{Pair{Base.PkgId, UInt64}}, source::Nothing)
   @ Base ./loading.jl:1213
 [4] top-level scope
   @ none:1
 [5] eval
   @ ./boot.jl:360 [inlined]
 [6] eval(x::Expr)
   @ Base.MainInclude ./client.jl:446
 [7] top-level scope
   @ none:1
in expression starting at /home/xxx/.julia/packages/Hadamard/3fngh/src/Hadamard.jl:6
ERROR: Failed to precompile Hadamard [4a05ff16-5f95-55f4-bb53-bb3f467c689a] to /home/xxx/.julia/compiled/v1.6/Hadamard/jl_FbfP53.
Stacktrace:
 [1] error(s::String)
   @ Base ./error.jl:33
 [2] compilecache(pkg::Base.PkgId, path::String, internal_stderr::Base.TTY, internal_stdout::Base.TTY)
   @ Base ./loading.jl:1360
 [3] compilecache(pkg::Base.PkgId, path::String)
   @ Base ./loading.jl:1306
 [4] _require(pkg::Base.PkgId)
   @ Base ./loading.jl:1021
 [5] require(uuidkey::Base.PkgId)
   @ Base ./loading.jl:914
 [6] require(into::Module, mod::Symbol)
   @ Base ./loading.jl:901

Julia Version 1.6.0
Commit f9720dc2eb (2021-03-24 12:55 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Core(TM) i5-7500 CPU @ 3.40GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-11.0.1 (ORCJIT, skylake)

##### Current package: Hadamard
INFO: Cloning cache of Hadamard from git://github.com/stevengj/Hadamard.jl.git
INFO: Installing Hadamard v0.0.0
INFO: REQUIRE updated.
WARNING: max(x) is deprecated, use maximum(x) instead.
 in depwarn at deprecated.jl:29
 in max at deprecated.jl:19
 in ifwht at /home/idunning/pkgtest/.julia/v0.2/Hadamard/src/Hadamard.jl:145
 in include at boot.jl:238
WARNING: max(x) is deprecated, use maximum(x) instead.
 in depwarn at deprecated.jl:29
 in max at deprecated.jl:19
 in ifwht at /home/idunning/pkgtest/.julia/v0.2/Hadamard/src/Hadamard.jl:145
 in ifwht at /home/idunning/pkgtest/.julia/v0.2/Hadamard/src/Hadamard.jl:187
 in include at boot.jl:238
WARNING: max(x) is deprecated, use maximum(x) instead.
 in depwarn at deprecated.jl:29
 in max at deprecated.jl:19
 in ifwht at /home/idunning/pkgtest/.julia/v0.2/Hadamard/src/Hadamard.jl:145
 in fwht at /home/idunning/pkgtest/.julia/v0.2/Hadamard/src/Hadamard.jl:198
 in anonymous at no file:90
 in include at boot.jl:238
WARNING: max(x) is deprecated, use maximum(x) instead.
 in depwarn at deprecated.jl:29
 in max at deprecated.jl:19
 in norminf at /home/idunning/pkgtest/.julia/v0.2/Hadamard/test/hadamard.jl:86
 in anonymous at no file:90
 in include at boot.jl:238
INFO: Removing Hadamard v0.0.0
INFO: REQUIRE updated.

function had(n) begin
        z=1
        for i=1:log2(n)
           z= kron(z,[1 1;1 -1])
        end
    end
    z
    end

n=1024
@time hadamard(n);
@time had(n);
elapsed time: 0.026615681 seconds (16779744 bytes allocated)
elapsed time: 0.006890752 seconds (11186592 bytes allocated)