Module metadata being loaded multiple times

[devmuroid]

I successfully ran the project and exited by pressing Ctrl+C. Then, when I run gleam run the following error is displayed:

/private/tmp/gleam-20220628-94884-o8g5z1/gleam-0.22.1/compiler-core/src/build/project_compiler.rs:348
        Metadata loaded for already loaded module: Module { name: ["gleam", "set"], origin: Src, package: "gleam_stdlib", types: {"Set": TypeConstructor { public: true, origin: SrcSpan { start: 0, end: 0 }, module: ["gleam", "set"], parameters: [Var { type_: RefCell { value: Generic { id: 1 } } }], typ: App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 1 } } }] } }}, types_constructors: {"Result": ["Ok", "Error"], "Bool": ["True", "False"], "Set": ["Set"]}, values: {"fold": ValueConstructor { public: true, variant: ModuleFn { name: "fold", field_map: Some(FieldMap { arity: 3, fields: {"over": 0, "from": 1, "with": 2} }), module: ["gleam", "set"], arity: 3, location: SrcSpan { start: 3260, end: 3367 } }, type_: Fn { args: [App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 12 } } }] }, Var { type_: RefCell { value: Generic { id: 11 } } }, Fn { args: [Var { type_: RefCell { value: Generic { id: 11 } } }, Var { type_: RefCell { value: Generic { id: 12 } } }], retrn: Var { type_: RefCell { value: Generic { id: 11 } } } }], retrn: Var { type_: RefCell { value: Generic { id: 11 } } } } }, "union": ValueConstructor { public: true, variant: ModuleFn { name: "union", field_map: Some(FieldMap { arity: 2, fields: {"of": 0, "and": 1} }), module: ["gleam", "set"], arity: 2, location: SrcSpan { start: 4782, end: 4857 } }, type_: Fn { args: [App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 5 } } }] }, App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 5 } } }] }], retrn: App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 5 } } }] } } }, "intersection": ValueConstructor { public: true, variant: ModuleFn { name: "intersection", field_map: Some(FieldMap { arity: 2, fields: {"of": 0, "and": 1} }), module: ["gleam", "set"], arity: 2, location: SrcSpan { start: 5215, end: 5304 } }, type_: Fn { args: [App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 4 } } }] }, App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 4 } } }] }], retrn: App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 4 } } }] } } }, "new": ValueConstructor { public: true, variant: ModuleFn { name: "new", field_map: None, module: ["gleam", "set"], arity: 0, location: SrcSpan { start: 586, end: 613 } }, type_: Fn { args: [], retrn: App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 6 } } }] } } }, "from_list": ValueConstructor { public: true, variant: ModuleFn { name: "from_list", field_map: None, module: ["gleam", "set"], arity: 1, location: SrcSpan { start: 2600, end: 2654 } }, type_: Fn { args: [App { public: true, module: [], name: "List", args: [Var { type_: RefCell { value: Generic { id: 7 } } }] }], retrn: App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 7 } } }] } } }, "delete": ValueConstructor { public: true, variant: ModuleFn { name: "delete", field_map: Some(FieldMap { arity: 2, fields: {"from": 0, "this": 1} }), module: ["gleam", "set"], arity: 2, location: SrcSpan { start: 1837, end: 1909 } }, type_: Fn { args: [App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 9 } } }] }, Var { type_: RefCell { value: Generic { id: 9 } } }], retrn: App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 9 } } }] } } }, "take": ValueConstructor { public: true, variant: ModuleFn { name: "take", field_map: Some(FieldMap { arity: 2, fields: {"from": 0, "keeping": 1} }), module: ["gleam", "set"], arity: 2, location: SrcSpan { start: 4206, end: 4286 } }, type_: Fn { args: [App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 10 } } }] }, App { public: true, module: [], name: "List", args: [Var { type_: RefCell { value: Generic { id: 10 } } }] }], retrn: App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 10 } } }] } } }, "filter": ValueConstructor { public: true, variant: ModuleFn { name: "filter", field_map: Some(FieldMap { arity: 2, fields: {"in": 0, "for": 1} }), module: ["gleam", "set"], arity: 2, location: SrcSpan { start: 3787, end: 3877 } }, type_: Fn { args: [App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 14 } } }] }, Fn { args: [Var { type_: RefCell { value: Generic { id: 14 } } }], retrn: App { public: true, module: [], name: "Bool", args: [] } }], retrn: App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 14 } } }] } } }, "size": ValueConstructor { public: true, variant: ModuleFn { name: "size", field_map: None, module: ["gleam", "set"], arity: 1, location: SrcSpan { start: 823, end: 859 } }, type_: Fn { args: [App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 8 } } }] }], retrn: App { public: true, module: [], name: "Int", args: [] } } }, "insert": ValueConstructor { public: true, variant: ModuleFn { name: "insert", field_map: Some(FieldMap { arity: 2, fields: {"into": 0, "this": 1} }), module: ["gleam", "set"], arity: 2, location: SrcSpan { start: 1070, end: 1142 } }, type_: Fn { args: [App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 13 } } }] }, Var { type_: RefCell { value: Generic { id: 13 } } }], retrn: App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 13 } } }] } } }, "to_list": ValueConstructor { public: true, variant: ModuleFn { name: "to_list", field_map: None, module: ["gleam", "set"], arity: 1, location: SrcSpan { start: 2274, end: 2322 } }, type_: Fn { args: [App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 3 } } }] }], retrn: App { public: true, module: [], name: "List", args: [Var { type_: RefCell { value: Generic { id: 3 } } }] } } }, "contains": ValueConstructor { public: true, variant: ModuleFn { name: "contains", field_map: Some(FieldMap { arity: 2, fields: {"in": 0, "this": 1} }), module: ["gleam", "set"], arity: 2, location: SrcSpan { start: 1445, end: 1510 } }, type_: Fn { args: [App { public: true, module: ["gleam", "set"], name: "Set", args: [Var { type_: RefCell { value: Generic { id: 2 } } }] }, Var { type_: RefCell { value: Generic { id: 2 } } }], retrn: App { public: true, module: [], name: "Bool", args: [] } } }}, accessors: {} }

Code that produces the crash:

import gleam/erlang/process
import gleam/http/cowboy
import gleam/http/response.{Response}
import gleam/http/request.{Request}
import gleam/bit_builder.{BitBuilder}

// Define a HTTP service
//
pub fn my_service(_request: Request(t)) -> Response(BitBuilder) {
  let body = bit_builder.from_string("Hello, world!")

  response.new(200)
  |> response.prepend_header("made-with", "Gleam")
  |> response.set_body(body)
}

// Start it on port 3000!
//
pub fn main() {
  let _r = cowboy.start(my_service, on_port: 3000)
  process.sleep_forever()
}

[lpil]

Hello! Could you share the full project? It's not that code that is causing the issue.

[devmuroid]

The project is at https://github.com/devmuroid/app_gleam.

[lpil]

Thank you

[lpil]

I've been unable to reproduce with that project. Is it still in a bad state on your machine? Would you be able to send me a list of all the files within it? find . > files.txt

[devmuroid]

I get the same error with the following file list:

files.txt

[lpil]

Hmm, I can only see one metadata file for gleam/set there. I don't have any ideas for how this could be happening.

I wonder if it's related to these .icloud files, perhaps another program was concurrently making modifications to the build directory.

[lpil]

I've reworked build locking and module loading, please reopen if this returns.