E4023

The trait is not found.

Erroneous Example

let a = true as &Sh0w

The example above tries to cast a boolean value to an object of the Sh0w trait, but this trait is not found in the current scope, giving the following error on line 1:

The trait Sh0w is not found.

Suggestion

Make sure the trait name is correct:

let a = true as &Show