record without inferred constructor made it to code generati

Error message

record without inferred constructor made it to code generation

What it means

Error "record without inferred constructor made it to code generation" thrown in gleam-lang/gleam.

Source

Thrown at compiler-core/src/javascript/expression.rs:2772

            Constant::Record { type_, name, .. } if type_.is_bool() && name == "True" => {
                TRUE_LOWERCASE_DOCUMENT
            }
            Constant::Record { type_, name, .. } if type_.is_bool() && name == "False" => {
                FALSE_LOWERCASE_DOCUMENT
            }
            Constant::Record { type_, .. } if type_.is_nil() => UNDEFINED_DOCUMENT,

            Constant::Record {
                arguments,
                module,
                name,
                type_,
                ..
            } => {
                let tag = expression
                    .constant_record_tag()
                    .expect("record without inferred constructor made it to code generation");

                if module.is_none() && type_.is_result() {
                    if tag == "Ok" {
                        self.tracker.ok_used = true;
                    } else {
                        self.tracker.error_used = true;
                    }
                }

                // If there's no arguments, then this is either a constructor
                // which takes arguments being referenced rather than called,
                // or a variant with no fields at all.
                if arguments.is_none() {
                    // If the constructor is not a function that takes arguments,
                    // it effectively has zero arity.
                    let arity = type_.fn_arity().unwrap_or(0) as u16;
                    return self.record_constructor(
                        arena,

View on GitHub (pinned to 7e623aa83d)

When it happens

Trigger: Thrown at compiler-core/src/javascript/expression.rs:2772 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of gleam-lang/gleam@7e623aa83d (2026-08-17). Data as JSON: /api/errors/c440273843a62d78. Report an issue: GitHub.