[Zed Editor] XPEngine.Build crashes while typing and stops working until workspace reload

[dabaer]

• Server: expert (id 0)
• Version: 0.1.0-rc.5-44a43e2
• Editor: Zed 0.225.10
• Ecto: 3.13.5
• Elixir 1.19.5-otp-28
• Erlang 28.3.1

When typing out Ecto schema definitions, I find Expert will often crash in the middle of typing a field (specifically right after I type the first letter of the field data type atom). I get a diagnostic message like this:

And in the LSP logs this error occurs:

handled notification client -> server textDocument/didChange in 962µs
Node port message: 
14:08:55.914 [error] GenServer XPEngine.Build terminating
** (stop) exited in: GenServer.call(Mix.ProjectStack, {:update_state, #Function<18.71857876/1 in Mix.ProjectStack.post_config/1>}, :infinity)
    ** (EXIT) no process: the process is not alive or there's no process currently associated with the given name, possibly because its application isn't started
    (elixir 1.19.5) lib/gen_server.ex:1135: GenServer.call/3
    (xp_engine 0.1.0-rc.5-44a43e2) lib/engine/mix.ex:20: anonymous fn/3 in XPEngine.Mix.in_project/2
    (kernel 10.5) global.erl:703: :global.trans/4
    (stdlib 7.2) timer.erl:599: :timer.tc/2
    (xp_engine 0.1.0-rc.5-44a43e2) lib/engine/build/state.ex:153: anonymous fn/3 in XPEngine.Build.State.compile_file/2
    (kernel 10.5) global.erl:703: :global.trans/4
    (xp_engine 0.1.0-rc.5-44a43e2) lib/engine/build/state.ex:146: XPEngine.Build.State.compile_file/2
    (stdlib 7.2) maps.erl:894: :maps.fold_1/4
Last message: :timeout
State: %XPEngine.Build.State{project: %XPForge.Project{root_uri: "file:///.../edi-sender", mix_exs_uri: "file:///.../edi-sender/mix.exs", mix_project?: true, mix_env: nil, mix_target: nil, env_variables: %{}, project_module: EdiSender.MixProject, entropy: 26199}, build_number: 0, uri_to_document: %{"file:///.../edi-sender/lib/edi_sender/edi/customer.ex" => #XPForge.Document<path: "/.../edi-sender/lib/edi_sender/edi/customer.ex", version: 152, dirty?: true, lines: %Lines<"defmodule EdiSender.Edi.Customer do..."(22 lines)>, ...>}, project_compile: :none}

This error repeats if I try to change any document further and Expert will no longer provide diagnostics or cmd-click to go to module functionality until I reload the entire Zed workspace.

[katafrakt]

I tried to reproduce it, but without luck. Do you have more logs when this happens? The one you shared is about Mix.ProjectStack already being dead, but something had to cause it to crash. Maybe there are some hints in previous messages.

[dabaer]

Apologies for the delay, yes I think this is the original error that caused it to shutdown:

Node port message: 
14:08:55.316 [error] GenServer Mix.ProjectStack terminating
** (FunctionClauseError) no function clause matching in anonymous fn/1 in Mix.ProjectStack.config_mtime/0
    (mix 1.19.5) lib/mix/project_stack.ex:120: anonymous fn([]) in Mix.ProjectStack.config_mtime/0
    (mix 1.19.5) lib/mix/project_stack.ex:330: Mix.ProjectStack.handle_call/3
    (stdlib 7.2) gen_server.erl:2470: :gen_server.try_handle_call/4
    (stdlib 7.2) gen_server.erl:2499: :gen_server.handle_msg/3
    (stdlib 7.2) proc_lib.erl:333: :proc_lib.init_p_do_apply/3
Last message (from #PID<0.4323.0>): {:update_stack, #Function<5.71857876/1 in Mix.ProjectStack.config_mtime/0>}
State: {[], []}
Client #PID<0.4323.0> is alive

    (stdlib 7.2) gen.erl:243: :gen.do_call/4
    (elixir 1.19.5) lib/gen_server.ex:1139: GenServer.call/3
    (xp_forge 0.1.0-rc.5-44a43e2) lib/future/mix/tasks/format.ex:475: Mix.Tasks.Future.Format.read_manifest/1
    (xp_forge 0.1.0-rc.5-44a43e2) lib/future/mix/tasks/format.ex:466: Mix.Tasks.Future.Format.maybe_cache_in_manifest/3
    (xp_forge 0.1.0-rc.5-44a43e2) lib/future/mix/tasks/format.ex:446: Mix.Tasks.Future.Format.eval_deps_and_subdirectories/5
    (xp_forge 0.1.0-rc.5-44a43e2) lib/future/mix/tasks/format.ex:393: Mix.Tasks.Future.Format.formatter_for_file/2
    (xp_engine 0.1.0-rc.5-44a43e2) lib/engine/code_mod/format.ex:251: XPEngine.CodeMod.Format.mix_formatter_from_task/2
    (xp_engine 0.1.0-rc.5-44a43e2) lib/engine/code_mod/format.ex:167: XPEngine.CodeMod.Format.formatter_for_file/2
Node port message: 
14:08:55.326 [notice] Application mix exited: shutdown