1 Attempted to dereference a variable which cannot be dereferenced.
3 Erroneous code example:
7 *y; // error: type `u32` cannot be dereferenced
10 Only types implementing `std::ops::Deref` can be dereferenced (such as `&T`).
16 // So here, `x` is a `&u32`, so we can dereference it: