Crash with AppendonlyMarker

[fonsp]

My notebook crashed today running some cells, (triggered by the file watching cell)

Notebook after crashing (stuck in this state): https://gist.github.com/fonsp/cbb184f87323184afbbeb372eb5727e5

┌ Error: Failed to relay self-update
│   exception =
│    Not really supposed to diff AppendonlyMarker with the original being longer than the next version (you know, 'append only' and al)
│    Stacktrace:
│      [1] diff(a::Pluto.FirebaseyUtils.AppendonlyMarker{Dict{String, Any}}, b::Pluto.FirebaseyUtils.AppendonlyMarker{Dict{String, Any}})
│        @ Pluto.FirebaseyUtils ~/.julia/packages/Pluto/JxOQL/src/webserver/FirebaseyUtils.jl:185
│      [2] diff(o1::Dict{String, Any}, o2::Dict{String, Any}) (repeats 3 times)
│        @ Pluto.Firebasey ~/.julia/packages/Pluto/JxOQL/src/webserver/Firebasey.jl:378
│      [3] send_notebook_changes!(🙋::Pluto.ClientRequest; commentary::Nothing, skip_send::Bool)
│        @ Pluto ~/.julia/packages/Pluto/JxOQL/src/webserver/Dynamic.jl:183
│      [4] send_notebook_changes!
│        @ ~/.julia/packages/Pluto/JxOQL/src/webserver/Dynamic.jl:178 [inlined]
│      [5] #242
│        @ ~/.julia/packages/Pluto/JxOQL/src/evaluation/Run.jl:137 [inlined]
│      [6] #32
│        @ ~/.julia/packages/Pluto/JxOQL/src/evaluation/Throttled.jl:23 [inlined]
│      [7] lock(f::Pluto.var"#32#35"{Pluto.var"#242#248"{Pluto.ServerSession, Pluto.Notebook}, Base.RefValue{Bool}}, l::ReentrantLock)
│        @ Base ./lock.jl:185
│      [8] flush
│        @ ~/.julia/packages/Pluto/JxOQL/src/evaluation/Throttled.jl:21 [inlined]
│      [9] throttled_f
│        @ ~/.julia/packages/Pluto/JxOQL/src/evaluation/Throttled.jl:41 [inlined]
│     [10] run_reactive_core!(session::Pluto.ServerSession, notebook::Pluto.Notebook, old_topology::Pluto.NotebookTopology, new_topology::Pluto.NotebookTopology, roots::Vector{Pluto.Cell}; save::Bool, deletion_hook::typeof(Pluto.WorkspaceManager.move_vars), user_requested_run::Bool, already_run::Vector{Pluto.Cell}, bond_value_pairs::Base.Iterators.Zip{Tuple{Vector{Symbol}, Vector{Any}}})
│        @ Pluto ~/.julia/packages/Pluto/JxOQL/src/evaluation/Run.jl:167
│     [11] #237
│        @ ~/.julia/packages/Pluto/JxOQL/src/evaluation/Run.jl:22 [inlined]
│     [12] withtoken(f::Pluto.var"#237#238"{Bool, typeof(Pluto.WorkspaceManager.move_vars), Bool, Base.Iterators.Zip{Tuple{Vector{Symbol}, Vector{Any}}}, Pluto.ServerSession, Pluto.Notebook, Pluto.NotebookTopology, Pluto.NotebookTopology, Vector{Pluto.Cell}}, token::Pluto.Token)
│        @ Pluto ~/.julia/packages/Pluto/JxOQL/src/evaluation/Tokens.jl:19
│     [13] #run_reactive!#236
│        @ ~/.julia/packages/Pluto/JxOQL/src/evaluation/Run.jl:21 [inlined]
│     [14] start_relaying_self_updates(::Tuple{Pluto.ServerSession, Pluto.Notebook}, run_channel::Distributed.RemoteChannel{Channel{Base.UUID}})
│        @ Pluto.WorkspaceManager ~/.julia/packages/Pluto/JxOQL/src/evaluation/WorkspaceManager.jl:143
│     [15] (::Pluto.WorkspaceManager.var"#4#6"{Pluto.Notebook, Pluto.ServerSession, Distributed.RemoteChannel{Channel{Base.UUID}}})()
│        @ Pluto.WorkspaceManager ./task.jl:484
└ @ Pluto.WorkspaceManager ~/.julia/packages/Pluto/JxOQL/src/evaluation/WorkspaceManager.jl:148

[fonsp]

This might have surfaced because of the additional async update messages from #2399