Pluto.jl: Error when loading notebook with unicode operator

[garrison]

The following notebook errors with StringIndexError("⊻=", 3) when starting up, and afterward fails to compute changes to that cell:

### A Pluto.jl notebook ###
# v0.11.13

using Markdown
using InteractiveUtils

# ╔═╡ 863ffa66-f2a9-11ea-3ab2-51408bcb2a92
function f(z)
    z = copy(z)
    z[end] ⊻= 1
    z
end

# ╔═╡ 9bac7cc6-f2a9-11ea-3289-b546aaf93586
f([1,2,3])

# ╔═╡ Cell order:
# ╠═863ffa66-f2a9-11ea-3ab2-51408bcb2a92
# ╠═9bac7cc6-f2a9-11ea-3289-b546aaf93586

This seems similar to #103.

[fonsp]

Can you post the entire stacktrace?

[garrison]

┌ Error: Expression explorer failed on: 
│   ex =
│    :($(Expr(:toplevel, :(#= /tmp/bug2.jl#==#863ffa66-f2a9-11ea-3ab2-51408bcb2a92:1 =#), :(function f(z)
│          #= /tmp/bug2.jl#==#863ffa66-f2a9-11ea-3ab2-51408bcb2a92:1 =#
│          #= /tmp/bug2.jl#==#863ffa66-f2a9-11ea-3ab2-51408bcb2a92:2 =#
│          z = copy(z)
│          #= /tmp/bug2.jl#==#863ffa66-f2a9-11ea-3ab2-51408bcb2a92:3 =#
│          z[end] ⊻= 1
│          #= /tmp/bug2.jl#==#863ffa66-f2a9-11ea-3ab2-51408bcb2a92:4 =#
│          z
│      end))))
└ @ Pluto.ExpressionExplorer ~/.julia/packages/Pluto/lHgT4/src/analysis/ExpressionExplorer.jl:662
StringIndexError("⊻=", 3)
Stacktrace:
 [1] try_compute_symbolreferences(::Expr) at /home/garrison/.julia/packages/Pluto/lHgT4/src/analysis/ExpressionExplorer.jl:663
 [2] #41 at ./none:0 [inlined]
 [3] iterate at ./generator.jl:47 [inlined]
 [4] Dict{Pluto.Cell,Pluto.ExpressionExplorer.SymbolsState}(::Base.Generator{Array{Pluto.Cell,1},Pluto.var"#41#43"}) at ./dict.jl:102
 [5] dict_with_eltype at ./abstractdict.jl:531 [inlined]
 [6] dict_with_eltype at ./abstractdict.jl:538 [inlined]
 [7] Dict(::Base.Generator{Array{Pluto.Cell,1},Pluto.var"#41#43"}) at ./dict.jl:128
 [8] updated_topology(::Pluto.NotebookTopology, ::Pluto.Notebook, ::Array{Pluto.Cell,1}) at /home/garrison/.julia/packages/Pluto/lHgT4/src/evaluation/Update.jl:17
 [9] load_notebook(::String) at /home/garrison/.julia/packages/Pluto/lHgT4/src/notebook/Notebook.jl:183
 [10] open(::Pluto.ServerSession, ::String; run_async::Bool) at /home/garrison/.julia/packages/Pluto/lHgT4/src/webserver/SessionActions.jl:21
 [11] open at /home/garrison/.julia/packages/Pluto/lHgT4/src/webserver/SessionActions.jl:15 [inlined]
 [12] (::Pluto.var"#try_launch_notebook_response#101"{Pluto.var"#try_launch_notebook_response#90#102"{Pluto.ServerSession}})(::typeof(Pluto.SessionActions.open), ::String; title::String, advice::String, home_url::String) at /home/garrison/.julia/packages/Pluto/lHgT4/src/webserver/Static.jl:63
 [13] (::Pluto.var"#serve_openfile#104"{Pluto.ServerSession,Pluto.ServerSecurity})(::HTTP.Messages.Request) at /home/garrison/.julia/packages/Pluto/lHgT4/src/webserver/Static.jl:91
 [14] handle(::HTTP.Handlers.RequestHandlerFunction{Pluto.var"#serve_openfile#104"{Pluto.ServerSession,Pluto.ServerSecurity}}, ::HTTP.Messages.Request) at /home/garrison/.julia/packages/HTTP/atT5q/src/Handlers.jl:253
 [15] handle(::HTTP.Handlers.Router{Symbol("##253")}, ::HTTP.Messages.Request) at /home/garrison/.julia/packages/HTTP/atT5q/src/Handlers.jl:467
 [16] (::Pluto.var"#195#202"{Pluto.ServerSession,HTTP.Handlers.Router{Symbol("##253")},Base.RefValue{Function}})(::HTTP.Streams.Stream{HTTP.Messages.Request,HTTP.ConnectionPool.Transaction{Sockets.TCPSocket}}) at /home/garrison/.julia/packages/Pluto/lHgT4/src/webserver/WebServer.jl:133
 [17] handle at /home/garrison/.julia/packages/HTTP/atT5q/src/Handlers.jl:269 [inlined]
 [18] #4 at /home/garrison/.julia/packages/HTTP/atT5q/src/Handlers.jl:345 [inlined]
 [19] macro expansion at /home/garrison/.julia/packages/HTTP/atT5q/src/Servers.jl:367 [inlined]
 [20] (::HTTP.Servers.var"#13#14"{HTTP.Handlers.var"#4#5"{HTTP.Handlers.StreamHandlerFunction{Pluto.var"#195#202"{Pluto.ServerSession,HTTP.Handlers.Router{Symbol("##253")},Base.RefValue{Function}}}},HTTP.ConnectionPool.Transaction{Sockets.TCPSocket},HTTP.Streams.Stream{HTTP.Messages.Request,HTTP.ConnectionPool.Transaction{Sockets.TCPSocket}}})() at ./task.jl:356┌ Error: Expression explorer failed on: 
│   ex =
│    :($(Expr(:toplevel, :(#= /tmp/bug2.jl#==#863ffa66-f2a9-11ea-3ab2-51408bcb2a92:1 =#), :(function f(z)
│          #= /tmp/bug2.jl#==#863ffa66-f2a9-11ea-3ab2-51408bcb2a92:1 =#
│          #= /tmp/bug2.jl#==#863ffa66-f2a9-11ea-3ab2-51408bcb2a92:2 =#
│          z = copy(z)
│          #= /tmp/bug2.jl#==#863ffa66-f2a9-11ea-3ab2-51408bcb2a92:3 =#
│          z[end] ⊻= 1
│          #= /tmp/bug2.jl#==#863ffa66-f2a9-11ea-3ab2-51408bcb2a92:4 =#
│          z
│      end))))
└ @ Pluto.ExpressionExplorer ~/.julia/packages/Pluto/lHgT4/src/analysis/ExpressionExplorer.jl:662
StringIndexError("⊻=", 3)
Stacktrace:
 [1] try_compute_symbolreferences(::Expr) at /home/garrison/.julia/packages/Pluto/lHgT4/src/analysis/ExpressionExplorer.jl:663
 [2] #41 at ./none:0 [inlined]
 [3] iterate at ./generator.jl:47 [inlined]
 [4] Dict{Pluto.Cell,Pluto.ExpressionExplorer.SymbolsState}(::Base.Generator{Array{Pluto.Cell,1},Pluto.var"#41#43"}) at ./dict.jl:102
 [5] dict_with_eltype at ./abstractdict.jl:531 [inlined]
 [6] dict_with_eltype at ./abstractdict.jl:538 [inlined]
 [7] Dict(::Base.Generator{Array{Pluto.Cell,1},Pluto.var"#41#43"}) at ./dict.jl:128
 [8] updated_topology(::Pluto.NotebookTopology, ::Pluto.Notebook, ::Array{Pluto.Cell,1}) at /home/garrison/.julia/packages/Pluto/lHgT4/src/evaluation/Update.jl:17
 [9] update_save_run!(::Pluto.ServerSession, ::Pluto.Notebook, ::Array{Pluto.Cell,1}; save::Bool, run_async::Bool, prerender_text::Bool, kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at /home/garrison/.julia/packages/Pluto/lHgT4/src/evaluation/Run.jl:108
 [10] open(::Pluto.ServerSession, ::String; run_async::Bool) at /home/garrison/.julia/packages/Pluto/lHgT4/src/webserver/SessionActions.jl:24
 [11] open at /home/garrison/.julia/packages/Pluto/lHgT4/src/webserver/SessionActions.jl:15 [inlined]
 [12] (::Pluto.var"#try_launch_notebook_response#101"{Pluto.var"#try_launch_notebook_response#90#102"{Pluto.ServerSession}})(::typeof(Pluto.SessionActions.open), ::String; title::String, advice::String, home_url::String) at /home/garrison/.julia/packages/Pluto/lHgT4/src/webserver/Static.jl:63
 [13] (::Pluto.var"#serve_openfile#104"{Pluto.ServerSession,Pluto.ServerSecurity})(::HTTP.Messages.Request) at /home/garrison/.julia/packages/Pluto/lHgT4/src/webserver/Static.jl:91
 [14] handle(::HTTP.Handlers.RequestHandlerFunction{Pluto.var"#serve_openfile#104"{Pluto.ServerSession,Pluto.ServerSecurity}}, ::HTTP.Messages.Request) at /home/garrison/.julia/packages/HTTP/atT5q/src/Handlers.jl:253
 [15] handle(::HTTP.Handlers.Router{Symbol("##253")}, ::HTTP.Messages.Request) at /home/garrison/.julia/packages/HTTP/atT5q/src/Handlers.jl:467
 [16] (::Pluto.var"#195#202"{Pluto.ServerSession,HTTP.Handlers.Router{Symbol("##253")},Base.RefValue{Function}})(::HTTP.Streams.Stream{HTTP.Messages.Request,HTTP.ConnectionPool.Transaction{Sockets.TCPSocket}}) at /home/garrison/.julia/packages/Pluto/lHgT4/src/webserver/WebServer.jl:133
 [17] handle at /home/garrison/.julia/packages/HTTP/atT5q/src/Handlers.jl:269 [inlined]
 [18] #4 at /home/garrison/.julia/packages/HTTP/atT5q/src/Handlers.jl:345 [inlined]
 [19] macro expansion at /home/garrison/.julia/packages/HTTP/atT5q/src/Servers.jl:367 [inlined]
 [20] (::HTTP.Servers.var"#13#14"{HTTP.Handlers.var"#4#5"{HTTP.Handlers.StreamHandlerFunction{Pluto.var"#195#202"{Pluto.ServerSession,HTTP.Handlers.Router{Symbol("##253")},Base.RefValue{Function}}}},HTTP.ConnectionPool.Transaction{Sockets.TCPSocket},HTTP.Streams.Stream{HTTP.Messages.Request,HTTP.ConnectionPool.Transaction{Sockets.TCPSocket}}})() at ./task.jl:356

[fonsp]

thanks!

[fonsp]

This is now a testset 🐻