E0412E0412 — Cannot Find Type in This Scope
A type name is used but not defined or imported in the current scope.
E0425An identifier is used but not defined in the current scope.
The variable, function, or constant is not declared in the current scope. It may be misspelled, not imported, or defined in a different module. Rust is case-sensitive and uses snake_case for variables.
Check for typos in the identifier name. Import the item with a use statement. Declare the variable before using it. Ensure module paths are correct.
fn main() {
println!("{}", x);
}E0412A type name is used but not defined or imported in the current scope.
E0117You are implementing a foreign trait for a foreign type, violating the orphan rule.
E0133An unsafe function or operation is used outside of an unsafe block.
E0433The module path used in a use statement or type path cannot be resolved.
E0515A function tries to return a reference to a value that is created inside the function.
E0200An unsafe trait must be implemented with an unsafe impl block.