Error code E0614

Attempted to dereference a variable which cannot be dereferenced.

Erroneous code example:

let y = 0u32;
*y; // error: type `u32` cannot be dereferenced

Only types implementing std::ops::Deref can be dereferenced (such as &T). Example:

let y = 0u32;
let x = &y;
// So here, `x` is a `&u32`, so we can dereference it:
*x; // ok!