BitIntegers does not work in Pluto

[PatrickHaecker]

The following code does not work in Pluto, but works in a REPL:

begin
    using BitIntegers
    @define_integers 24
end

Pluto shows the following error:

UndefVarError: `@define_integers` not defined in `Main.var"workspace#2"`

Suggestion: check for spelling errors or missing imports.
Stack trace

Here is what happened, the most recent locations are first:

    :0
    #macroexpand#74 @ expr.jl:125
    macroexpand @ expr.jl:123

[Pangoraw]

A macro cannot be used in the same expression as the using statement since macro expansion happens before using is executed, see #1592. There is a similar problem if you execute the same begin block in the REPL:

julia> begin
           using BitIntegers
           @define_integers 24
       end
ERROR: LoadError: UndefVarError: `@define_integers` not defined
in expression starting at REPL[4]:3

[PatrickHaecker]

I seem to have gone too far with providing a minimum non-working example, thanks for pointing out the problem (and sorry for testing the code in the REPL outside of the begin block).

However, the issue is that BigIntegers does not work in Pluto:

    using BitIntegers

    @define_integers 24

throws an error on the REPL which started Pluto:

 Error: Macro call expansion failed with a non-macroexpand error
│   exception =
│    Error deserializing data from Malt.Worker on port 9437 with PID 65437:
│    
│    UndefVarError: `workspace#3` not defined in `Main`

Writing it separately seems to work initially, but it then fails permanently for the session. It seems that it can be triggered by changing using BitIntegers into import BitIntegers: @define_integers to get the initially written error message. Changing it back to using BitIntegers will still result in an error.

[PatrickHaecker]

@Pangoraw Could you please reopen the issue, as the problem persists, only the MWE was incorrect.

As a temporary workaround, the following seems to work:

using BitIntegers

try
    @define_integers 24
catch
end

[disberd]

@PatrickHaecker are you by chance on julia 1.11? Can you try if this does not throw that error on 1.10?

This seems related to #2907 and JuliaPluto/Malt.jl#77

[fonsp]

This is indeed the same as #2907

[PatrickHaecker]

Yes, I am on 1.11 indeed. Sorry that I forgot to mention this.

Thanks for #3000. I installed Pluto#main and both the above mentioned error in the browser as well as the error in the REPL which started Pluto are gone.

However, I now get

cannot assign a value to imported variable workspace#5.Int24
Stack trace

when switching between using BitIntegers and import BitIntegers: @define_integers.

The problem seems to be this line

primitive type Int24 24 end

When I have a Pluto notebook with only this line and change it to

primitive type Int24 48 end

the error is triggered. Switching it back to 24 bits does not fix it. The error persists until I restart the Pluto notebook.
I obviously do not need to change this line, but it triggers the error which occurs otherwise after some changes in other cells, too.

[Pangoraw]

The problem seems to be this line
primitive type Int24 24 end

Thanks for reporting this one, this should be fixed by updating ExpressionExplorer.jl to 1.0.3.

[PatrickHaecker]

Thanks a lot for fixing that one!

However, I now get quite some errors on the starting REPL where the ExpressionExplorer is involved, where also primitive type occurs.
I might now be on a strange combination of versions:

(@v1.11) pkg> status
...
  [c3e4b0f8] Pluto v0.19.46 `https://github.com/fonsp/Pluto.jl.git#main`
  [ed5d0301] PlutoExtras v0.7.13
...

Please give me a hint if I should change versions.

[ Info: It looks like you are developing the Pluto package, using the unbundled frontend...
Precompiling PlutoRunner...
  1 dependency successfully precompiled in 12 seconds. 32 already precompiled.
┌ Warning: unknown use of `=`. Assignee is unrecognised.
│   ex = :($(Expr(:$, :acc)))
└ @ ExpressionExplorer ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:177
┌ Warning: unknown use of `=`. Assignee is unrecognised.
│   ex = :($(Expr(:$, :acc)))
└ @ ExpressionExplorer ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:177
┌ Warning: unknown use of `=`. Assignee is unrecognised.
│   ex = :($(Expr(:$, :acc)))
└ @ ExpressionExplorer ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:177
┌ Error: Expression explorer failed on: 
│   ex = :(primitive type $(Expr(:escape, :InfrastructureElementType)) <: Enum{Int32} 32 end)
└ @ ExpressionExplorer ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:1178
AssertionError: ex.head === :curly
Stacktrace:
  [1] uncurly!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:195
  [2] explore_funcdef!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:978
  [3] explore_funcdef!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:924
  [4] explore_function_macro!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:554
  [5] explore!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:798
  [6] explore_struct!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:527
  [7] explore_primitive!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:540
  [8] explore!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:794
  [9] compute_symbolreferences
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:1185 [inlined]
 [10] compute_symbols_state
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:1173
 [11] pretransform_pluto
    @ ~/.julia/packages/PlutoDependencyExplorer/AB0rJ/src/ExpressionExplorer.jl:43
 [12] #1
    @ ./none:0
 [13] iterate
    @ ./generator.jl:48
 [14] pretransform_pluto
    @ ~/.julia/packages/PlutoDependencyExplorer/AB0rJ/src/ExpressionExplorer.jl:78
 [15] pretransform_pluto
    @ ~/.julia/packages/PlutoDependencyExplorer/AB0rJ/src/ExpressionExplorer.jl:66
 [16] #1
    @ ./none:0
 [17] iterate
    @ ./generator.jl:48
 [18] pretransform_pluto
    @ ~/.julia/packages/PlutoDependencyExplorer/AB0rJ/src/ExpressionExplorer.jl:78
 [19] #updated_topology#46
    @ ~/.julia/packages/PlutoDependencyExplorer/AB0rJ/src/TopologyUpdate.jl:44
 [20] updated_topology
    @ ~/.julia/packages/PlutoDependencyExplorer/AB0rJ/src/TopologyUpdate.jl:25 [inlined]
 [21] updated_topology
    @ ~/.julia/packages/Pluto/N16V2/src/analysis/Parse.jl:125 [inlined]
 [22] #load_notebook#58
    @ ~/.julia/packages/Pluto/N16V2/src/notebook/saving and loading.jl:361
 [23] load_notebook
    @ ~/.julia/packages/Pluto/N16V2/src/notebook/saving and loading.jl:349 [inlined]
 [24] #open#2
    @ ~/.julia/packages/Pluto/N16V2/src/webserver/SessionActions.jl:68
 [25] open
    @ ~/.julia/packages/Pluto/N16V2/src/webserver/SessionActions.jl:44 [inlined]
 [26] (::Pluto.var"#try_launch_notebook_response#296"{Pluto.var"#try_launch_notebook_response#290#297"{Pluto.ServerSession}})(action::typeof(Pluto.SessionActions.open), path_or_url::String; as_redirect::Bool, title::String, advice::String, home_url::String, action_kwargs::@Kwargs{execution_allowed::Bool, as_sample::Bool, risky_file_source::Nothing})
    @ Pluto ~/.julia/packages/Pluto/N16V2/src/webserver/Router.jl:23
 [27] (::Pluto.var"#serve_openfile#299"{Pluto.ServerSession})(request::HTTP.Messages.Request)
    @ Pluto ~/.julia/packages/Pluto/N16V2/src/webserver/Router.jl:51
 [28] (::HTTP.Handlers.Router{typeof(Pluto.default_404), typeof(HTTP.Handlers.default405), Nothing})(req::HTTP.Messages.Request)
    @ HTTP.Handlers ~/.julia/packages/HTTP/sJD5V/src/Handlers.jl:439
 [29] (::Pluto.var"#283#285"{HTTP.Handlers.Router{typeof(Pluto.default_404), typeof(HTTP.Handlers.default405), Nothing}})(request::HTTP.Messages.Request)
    @ Pluto ~/.julia/packages/Pluto/N16V2/src/webserver/Authentication.jl:102
 [30] #280
    @ ~/.julia/packages/Pluto/N16V2/src/webserver/Authentication.jl:54 [inlined]
 [31] (::Pluto.var"#378#388"{Pluto.ServerSession, Pluto.var"#280#282"{Pluto.var"#283#285"{HTTP.Handlers.Router{typeof(Pluto.default_404), typeof(HTTP.Handlers.default405), Nothing}}, Pluto.ServerSession}})(http::HTTP.Streams.Stream{HTTP.Messages.Request, HTTP.Connections.Connection{Sockets.TCPSocket}})
    @ Pluto ~/.julia/packages/Pluto/N16V2/src/webserver/WebServer.jl:289
 [32] #invokelatest#2
    @ ./essentials.jl:1043 [inlined]
 [33] invokelatest
    @ ./essentials.jl:1040 [inlined]
 [34] handle_connection(f::Function, c::HTTP.Connections.Connection{Sockets.TCPSocket}, listener::HTTP.Servers.Listener{Nothing, Sockets.TCPServer}, readtimeout::Int64, access_log::Nothing)
    @ HTTP.Servers ~/.julia/packages/HTTP/sJD5V/src/Servers.jl:469
 [35] (::HTTP.Servers.var"#16#17"{Pluto.var"#378#388"{Pluto.ServerSession, Pluto.var"#280#282"{Pluto.var"#283#285"{HTTP.Handlers.Router{typeof(Pluto.default_404), typeof(HTTP.Handlers.default405), Nothing}}, Pluto.ServerSession}}, HTTP.Servers.Listener{Nothing, Sockets.TCPServer}, Set{HTTP.Connections.Connection}, Int64, Nothing, ReentrantLock, Base.Semaphore, HTTP.Connections.Connection{Sockets.TCPSocket}})()
    @ HTTP.Servers ~/.julia/packages/HTTP/sJD5V/src/Servers.jl:401┌ Warning: unknown use of `=`. Assignee is unrecognised.
│   ex = :($(Expr(:$, :acc)))
└ @ ExpressionExplorer ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:177
┌ Warning: unknown use of `=`. Assignee is unrecognised.
│   ex = :($(Expr(:$, :acc)))
└ @ ExpressionExplorer ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:177
┌ Warning: unknown use of `=`. Assignee is unrecognised.
│   ex = :($(Expr(:$, :acc)))
└ @ ExpressionExplorer ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:177
┌ Error: Expression explorer failed on: 
│   ex = :(primitive type $(Expr(:escape, :InfrastructureElementType)) <: Enum{Int32} 32 end)
└ @ ExpressionExplorer ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:1178
AssertionError: ex.head === :curly
Stacktrace:
  [1] uncurly!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:195
  [2] explore_funcdef!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:978
  [3] explore_funcdef!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:924
  [4] explore_function_macro!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:554
  [5] explore!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:798
  [6] explore_struct!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:527
  [7] explore_primitive!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:540
  [8] explore!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:794
  [9] compute_symbolreferences
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:1185 [inlined]
 [10] compute_symbols_state
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:1173
 [11] pretransform_pluto
    @ ~/.julia/packages/PlutoDependencyExplorer/AB0rJ/src/ExpressionExplorer.jl:43
 [12] #1
    @ ./none:0
 [13] iterate
    @ ./generator.jl:48
 [14] pretransform_pluto
    @ ~/.julia/packages/PlutoDependencyExplorer/AB0rJ/src/ExpressionExplorer.jl:78
 [15] #1
    @ ./none:0
 [16] iterate
    @ ./generator.jl:48
 [17] pretransform_pluto
    @ ~/.julia/packages/PlutoDependencyExplorer/AB0rJ/src/ExpressionExplorer.jl:78
 [18] static_macroexpand
    @ ~/.julia/packages/Pluto/N16V2/src/evaluation/MacroAnalysis.jl:188
 [19] #112
    @ ./none:0 [inlined]
 [20] iterate
    @ ./generator.jl:48 [inlined]
 [21] Dict
    @ ./dict.jl:95
 [22] static_resolve_topology
    @ ~/.julia/packages/Pluto/N16V2/src/evaluation/MacroAnalysis.jl:202
 [23] |>
    @ ./operators.jl:926 [inlined]
 [24] #load_notebook#58
    @ ~/.julia/packages/Pluto/N16V2/src/notebook/saving and loading.jl:361
 [25] load_notebook
    @ ~/.julia/packages/Pluto/N16V2/src/notebook/saving and loading.jl:349 [inlined]
 [26] #open#2
    @ ~/.julia/packages/Pluto/N16V2/src/webserver/SessionActions.jl:68
 [27] open
    @ ~/.julia/packages/Pluto/N16V2/src/webserver/SessionActions.jl:44 [inlined]
 [28] (::Pluto.var"#try_launch_notebook_response#296"{Pluto.var"#try_launch_notebook_response#290#297"{Pluto.ServerSession}})(action::typeof(Pluto.SessionActions.open), path_or_url::String; as_redirect::Bool, title::String, advice::String, home_url::String, action_kwargs::@Kwargs{execution_allowed::Bool, as_sample::Bool, risky_file_source::Nothing})
    @ Pluto ~/.julia/packages/Pluto/N16V2/src/webserver/Router.jl:23
 [29] (::Pluto.var"#serve_openfile#299"{Pluto.ServerSession})(request::HTTP.Messages.Request)
    @ Pluto ~/.julia/packages/Pluto/N16V2/src/webserver/Router.jl:51
 [30] (::HTTP.Handlers.Router{typeof(Pluto.default_404), typeof(HTTP.Handlers.default405), Nothing})(req::HTTP.Messages.Request)
    @ HTTP.Handlers ~/.julia/packages/HTTP/sJD5V/src/Handlers.jl:439
 [31] (::Pluto.var"#283#285"{HTTP.Handlers.Router{typeof(Pluto.default_404), typeof(HTTP.Handlers.default405), Nothing}})(request::HTTP.Messages.Request)
    @ Pluto ~/.julia/packages/Pluto/N16V2/src/webserver/Authentication.jl:102
 [32] #280
    @ ~/.julia/packages/Pluto/N16V2/src/webserver/Authentication.jl:54 [inlined]
 [33] (::Pluto.var"#378#388"{Pluto.ServerSession, Pluto.var"#280#282"{Pluto.var"#283#285"{HTTP.Handlers.Router{typeof(Pluto.default_404), typeof(HTTP.Handlers.default405), Nothing}}, Pluto.ServerSession}})(http::HTTP.Streams.Stream{HTTP.Messages.Request, HTTP.Connections.Connection{Sockets.TCPSocket}})
    @ Pluto ~/.julia/packages/Pluto/N16V2/src/webserver/WebServer.jl:289
 [34] #invokelatest#2
    @ ./essentials.jl:1043 [inlined]
 [35] invokelatest
    @ ./essentials.jl:1040 [inlined]
 [36] handle_connection(f::Function, c::HTTP.Connections.Connection{Sockets.TCPSocket}, listener::HTTP.Servers.Listener{Nothing, Sockets.TCPServer}, readtimeout::Int64, access_log::Nothing)
    @ HTTP.Servers ~/.julia/packages/HTTP/sJD5V/src/Servers.jl:469
 [37] (::HTTP.Servers.var"#16#17"{Pluto.var"#378#388"{Pluto.ServerSession, Pluto.var"#280#282"{Pluto.var"#283#285"{HTTP.Handlers.Router{typeof(Pluto.default_404), typeof(HTTP.Handlers.default405), Nothing}}, Pluto.ServerSession}}, HTTP.Servers.Listener{Nothing, Sockets.TCPServer}, Set{HTTP.Connections.Connection}, Int64, Nothing, ReentrantLock, Base.Semaphore, HTTP.Connections.Connection{Sockets.TCPSocket}})()
    @ HTTP.Servers ~/.julia/packages/HTTP/sJD5V/src/Servers.jl:401┌ Warning: unknown use of `=`. Assignee is unrecognised.
│   ex = :($(Expr(:$, :acc)))
└ @ ExpressionExplorer ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:177
┌ Warning: unknown use of `=`. Assignee is unrecognised.
│   ex = :($(Expr(:$, :acc)))
└ @ ExpressionExplorer ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:177
┌ Warning: unknown use of `=`. Assignee is unrecognised.
│   ex = :($(Expr(:$, :acc)))
└ @ ExpressionExplorer ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:177
┌ Error: Expression explorer failed on: 
│   ex = :(primitive type $(Expr(:escape, :InfrastructureElementType)) <: Enum{Int32} 32 end)
└ @ ExpressionExplorer ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:1178
AssertionError: ex.head === :curly
Stacktrace:
  [1] uncurly!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:195
  [2] explore_funcdef!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:978
  [3] explore_funcdef!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:924
  [4] explore_function_macro!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:554
  [5] explore!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:798
  [6] explore_struct!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:527
  [7] explore_primitive!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:540
  [8] explore!
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:794
  [9] compute_symbolreferences
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:1185 [inlined]
 [10] compute_symbols_state
    @ ~/.julia/packages/ExpressionExplorer/3RpwT/src/explore.jl:1173
 [11] pretransform_pluto
    @ ~/.julia/packages/PlutoDependencyExplorer/AB0rJ/src/ExpressionExplorer.jl:43
 [12] #1
    @ ./none:0
 [13] iterate
    @ ./generator.jl:48
 [14] pretransform_pluto
    @ ~/.julia/packages/PlutoDependencyExplorer/AB0rJ/src/ExpressionExplorer.jl:78
 [15] pretransform_pluto
    @ ~/.julia/packages/PlutoDependencyExplorer/AB0rJ/src/ExpressionExplorer.jl:66
 [16] #1
    @ ./none:0
 [17] iterate
    @ ./generator.jl:48
 [18] pretransform_pluto
    @ ~/.julia/packages/PlutoDependencyExplorer/AB0rJ/src/ExpressionExplorer.jl:78
 [19] #updated_topology#46
    @ ~/.julia/packages/PlutoDependencyExplorer/AB0rJ/src/TopologyUpdate.jl:44
 [20] updated_topology
    @ ~/.julia/packages/PlutoDependencyExplorer/AB0rJ/src/TopologyUpdate.jl:25 [inlined]
 [21] updated_topology
    @ ~/.julia/packages/Pluto/N16V2/src/analysis/Parse.jl:125 [inlined]
 [22] #update_save_run!#231
    @ ~/.julia/packages/Pluto/N16V2/src/evaluation/Run.jl:383
 [23] update_save_run!
    @ ~/.julia/packages/Pluto/N16V2/src/evaluation/Run.jl:370 [inlined]
 [24] #open#2
    @ ~/.julia/packages/Pluto/N16V2/src/webserver/SessionActions.jl:99
 [25] open
    @ ~/.julia/packages/Pluto/N16V2/src/webserver/SessionActions.jl:44 [inlined]
 [26] (::Pluto.var"#try_launch_notebook_response#296"{Pluto.var"#try_launch_notebook_response#290#297"{Pluto.ServerSession}})(action::typeof(Pluto.SessionActions.open), path_or_url::String; as_redirect::Bool, title::String, advice::String, home_url::String, action_kwargs::@Kwargs{execution_allowed::Bool, as_sample::Bool, risky_file_source::Nothing})
    @ Pluto ~/.julia/packages/Pluto/N16V2/src/webserver/Router.jl:23
 [27] (::Pluto.var"#serve_openfile#299"{Pluto.ServerSession})(request::HTTP.Messages.Request)
    @ Pluto ~/.julia/packages/Pluto/N16V2/src/webserver/Router.jl:51
 [28] (::HTTP.Handlers.Router{typeof(Pluto.default_404), typeof(HTTP.Handlers.default405), Nothing})(req::HTTP.Messages.Request)
    @ HTTP.Handlers ~/.julia/packages/HTTP/sJD5V/src/Handlers.jl:439
 [29] (::Pluto.var"#283#285"{HTTP.Handlers.Router{typeof(Pluto.default_404), typeof(HTTP.Handlers.default405), Nothing}})(request::HTTP.Messages.Request)
    @ Pluto ~/.julia/packages/Pluto/N16V2/src/webserver/Authentication.jl:102
 [30] #280
    @ ~/.julia/packages/Pluto/N16V2/src/webserver/Authentication.jl:54 [inlined]
 [31] (::Pluto.var"#378#388"{Pluto.ServerSession, Pluto.var"#280#282"{Pluto.var"#283#285"{HTTP.Handlers.Router{typeof(Pluto.default_404), typeof(HTTP.Handlers.default405), Nothing}}, Pluto.ServerSession}})(http::HTTP.Streams.Stream{HTTP.Messages.Request, HTTP.Connections.Connection{Sockets.TCPSocket}})
    @ Pluto ~/.julia/packages/Pluto/N16V2/src/webserver/WebServer.jl:289
 [32] #invokelatest#2
    @ ./essentials.jl:1043 [inlined]
 [33] invokelatest
    @ ./essentials.jl:1040 [inlined]
 [34] handle_connection(f::Function, c::HTTP.Connections.Connection{Sockets.TCPSocket}, listener::HTTP.Servers.Listener{Nothing, Sockets.TCPServer}, readtimeout::Int64, access_log::Nothing)
    @ HTTP.Servers ~/.julia/packages/HTTP/sJD5V/src/Servers.jl:469
 [35] (::HTTP.Servers.var"#16#17"{Pluto.var"#378#388"{Pluto.ServerSession, Pluto.var"#280#282"{Pluto.var"#283#285"{HTTP.Handlers.Router{typeof(Pluto.default_404), typeof(HTTP.Handlers.default405), Nothing}}, Pluto.ServerSession}}, HTTP.Servers.Listener{Nothing, Sockets.TCPServer}, Set{HTTP.Connections.Connection}, Int64, Nothing, ReentrantLock, Base.Semaphore, HTTP.Connections.Connection{Sockets.TCPSocket}})()
    @ HTTP.Servers ~/.julia/packages/HTTP/sJD5V/src/Servers.jl:401