# FLoops causing deep copy error with log message in loop

**URL:** https://discourse.julialang.org/t/floops-causing-deep-copy-error-with-log-message-in-loop/86683
**Category:** General Usage
**Tags:** package, floops
**Created:** [September 2, 2022, 10:52am UTC](https://discourse.julialang.org/t/floops-causing-deep-copy-error-with-log-message-in-loop/86683 "2022-09-02T10:52:45Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![this\_josh](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/this_josh/32/42679_2.png) [@this\_josh](https://discourse.julialang.org/u/this_josh)
#### Post date: [September 2, 2022, 10:52am UTC](https://discourse.julialang.org/t/floops-causing-deep-copy-error-with-log-message-in-loop/86683/1 "2022-09-02T10:52:46Z")

</div>

Having a log message inside an `@floop` gives a deep copy error. Is this expected behaviour?

```nohighlight
julia> using FLoops
julia> @floop for _ in 1:24
           @info Threads.threadid()
           sleep(1)
       end
ERROR: LoadError: deepcopy of Modules not supported
Stacktrace:
  [1] error(s::String)
    @ Base ./error.jl:33
  [2] deepcopy_internal(x::Module, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:33
  [3] _deepcopy_array_t(x::Array, T::Type, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:105
  [4] deepcopy_internal(x::Vector{Any}, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:92
  [5] deepcopy_internal(x::Any, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:65
  [6] _deepcopy_array_t(x::Array, T::Type, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:105
  [7] deepcopy_internal(x::Vector{Any}, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:92
  [8] deepcopy_internal(x::Any, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:65
  [9] _deepcopy_array_t(x::Array, T::Type, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:105
 [10] deepcopy_internal(x::Vector{Any}, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:92
 [11] deepcopy_internal(x::Any, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:65
 [12] _deepcopy_array_t(x::Array, T::Type, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:105
 [13] deepcopy_internal(x::Vector{Any}, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:92
 [14] deepcopy_internal(x::Any, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:65
 [15] _deepcopy_array_t(x::Array, T::Type, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:105
 [16] deepcopy_internal(x::Vector{Any}, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:92
 [17] deepcopy_internal(x::Any, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:65
 [18] _deepcopy_array_t(x::Array, T::Type, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:105
 [19] deepcopy_internal(x::Vector{Any}, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:92
 [20] deepcopy_internal(x::Any, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:65
 [21] _deepcopy_array_t(x::Array, T::Type, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:105
 [22] deepcopy_internal(x::Vector{Any}, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:92
 [23] deepcopy_internal(x::Any, stackdict::IdDict{Any, Any})
    @ Base ./deepcopy.jl:65
 [24] deepcopy
    @ ./deepcopy.jl:26 [inlined]
 [25] as_parallel_loop(ctx::FLoops.MacroContext, rf_arg::Symbol, coll::Expr, body0::Expr, simd::Bool, executor::Nothing)
    @ FLoops ~/.julia/packages/FLoops/3ZEuy/src/reduce.jl:606
 [26] floop_parallel(ctx::FLoops.MacroContext, ex::Expr, simd::Bool, executor::Nothing)
    @ FLoops ~/.julia/packages/FLoops/3ZEuy/src/reduce.jl:255
 [27] floop_parallel(ctx::FLoops.MacroContext, ex::Expr, simd::Bool)
    @ FLoops ~/.julia/packages/FLoops/3ZEuy/src/reduce.jl:245
 [28] var"@floop"( __source__ ::LineNumberNode, __module__ ::Module, ex::Any)
    @ FLoops ~/.julia/packages/FLoops/3ZEuy/src/macro.jl:43
in expression starting at REPL[7]:1

```