S0024: unknown built-in effect

Generated from rellum-diagnostics/src/db.rs.

Explanation

Effect expressions and request bindings can call only effects known to the analyzer. Unknown built-in effect names cannot be categorized for resource checks or lowered to runtime work.

Common causes

• misspelling a built-in effect name
• calling a wrapper before it is defined or imported
• using a pure function name with ! syntax

Canonical fixes

• use a known built-in effect or define an effect wrapper

Before:

main! = pritn!(value)

After:

main! = print!(value)

• remove ! when the callee is a pure function

Code example

main! = pritn!(value)

Links

• RellC diagnostic overview