Precompilation error for CSV package - PosLen not defined

General Usage
1

I have spent about an hour trying to fix a precompilation error related to the CSV package (full stacktrace at bottom).

As far as I can tell:

  • Deleting the compiled folder doesn’t help.
  • Neither does starting a new environment from fresh.
  • A bunch of other packages don’t pre-compile, but CSV actually gives me an error.
  • It’s due to my package, GEPPR.jl, which has CSV.jl as a dependency but I don’t know why. I’ve restricted CSV to >= 0.8.2 in my Project.toml, but I can’t see how that could be an issue, and I don’t understand why this started happening.
[ Info: Precompiling CSV [336ed68f-0bac-5ca0-87d4-7b16caf5d00b]
ERROR: LoadError: LoadError: UndefVarError: PosLen not defined
Stacktrace:
  [1] top-level scope
    @ ~/.julia/packages/WeakRefStrings/EDA28/src/poslenstrings.jl:6
  [2] include(mod::Module, _path::String)
    @ Base ./Base.jl:386
  [3] include(x::String)
    @ WeakRefStrings ~/.julia/packages/WeakRefStrings/EDA28/src/WeakRefStrings.jl:1
  [4] top-level scope
    @ ~/.julia/packages/WeakRefStrings/EDA28/src/WeakRefStrings.jl:543
  [5] include
    @ ./Base.jl:386 [inlined]
  [6] 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::String)
    @ Base ./loading.jl:1213
  [7] top-level scope
    @ none:1
  [8] eval
    @ ./boot.jl:360 [inlined]
  [9] eval(x::Expr)
    @ Base.MainInclude ./client.jl:446
 [10] top-level scope
    @ none:1
in expression starting at /home/u0128861/.julia/packages/WeakRefStrings/EDA28/src/poslenstrings.jl:6
in expression starting at /home/u0128861/.julia/packages/WeakRefStrings/EDA28/src/WeakRefStrings.jl:1
ERROR: LoadError: Failed to precompile WeakRefStrings [ea10d353-3f73-51f8-a26c-33c1cb351aa5] to /home/u0128861/.julia/compiled/v1.6/WeakRefStrings/jl_DqGy3W.
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
  [7] include
    @ ./Base.jl:386 [inlined]
  [8] 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
  [9] top-level scope
    @ none:1
 [10] eval
    @ ./boot.jl:360 [inlined]
 [11] eval(x::Expr)
    @ Base.MainInclude ./client.jl:446
 [12] top-level scope
    @ none:1
in expression starting at /home/u0128861/.julia/packages/CSV/bLdMU/src/CSV.jl:1
ERROR: Failed to precompile CSV [336ed68f-0bac-5ca0-87d4-7b16caf5d00b] to /home/u0128861/.julia/compiled/v1.6/CSV/jl_UAge9I.
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
  [7] eval
    @ ./boot.jl:360 [inlined]
  [8] eval
    @ ./Base.jl:39 [inlined]
  [9] repleval(m::Module, code::Expr, #unused#::String)
    @ VSCodeServer ~/.vscode/extensions/julialang.language-julia-1.3.33/scripts/packages/VSCodeServer/src/repl.jl:157
 [10] (::VSCodeServer.var"#69#71"{Module, Expr, REPL.LineEditREPL, REPL.LineEdit.Prompt})()
    @ VSCodeServer ~/.vscode/extensions/julialang.language-julia-1.3.33/scripts/packages/VSCodeServer/src/repl.jl:123
 [11] with_logstate(f::Function, logstate::Any)
    @ Base.CoreLogging ./logging.jl:491
 [12] with_logger
    @ ./logging.jl:603 [inlined]
 [13] (::VSCodeServer.var"#68#70"{Module, Expr, REPL.LineEditREPL, REPL.LineEdit.Prompt})()
    @ VSCodeServer ~/.vscode/extensions/julialang.language-julia-1.3.33/scripts/packages/VSCodeServer/src/repl.jl:124
 [14] #invokelatest#2
    @ ./essentials.jl:708 [inlined]
 [15] invokelatest(::Any)
    @ Base ./essentials.jl:706
 [16] macro expansion
    @ ~/.vscode/extensions/julialang.language-julia-1.3.33/scripts/packages/VSCodeServer/src/eval.jl:34 [inlined]
 [17] (::VSCodeServer.var"#53#54")()
    @ VSCodeServer ./task.jl:411
3 Likes
2

This appears to be a due to my environment having many packages, and some of them eventually breaking each other. Will report back.

3

I managed to fix this by doing pkg> pin CSV@0.8.5. I think the error is due to WeakRefStrings, hopefully gets fixed soon.

3 Likes
4

Do you have the output of ]st?

5

So I got quite excited and opened some Git issues, and timholy pointed me to this bug.

Those Git issues:
https://github.com/JuliaArrays/ArrayInterface.jl/issues/208
https://github.com/JuliaData/CSV.jl/issues/912

6

No, I have just 3 packages installed and am getting the same PosLen related error. Given the recency of your post and the fact that I am experiencing the same error, I’d recommend downgrading the CSV package.

7

Thanks, this worked for me too.

8

I’m having the same problem after installing julia 1.7.1 on linux mint. Thanks for the downgrade tip. I hope it gets fixed soon.