| error[E0599]: `*const u8` doesn't implement `std::fmt::Display` | 
 |   --> $DIR/suggest-convert-ptr-to-ref.rs:5:22 | 
 |    | | 
 | LL |     println!("{}", z.to_string()); | 
 |    |                      ^^^^^^^^^ method cannot be called on `*const u8` due to unsatisfied trait bounds | 
 |    | | 
 | note: the method `to_string` exists on the type `&u8` | 
 |   --> $SRC_DIR/alloc/src/string.rs:LL:COL | 
 |    = note: you might want to use the unsafe method `<*const T>::as_ref` to get an optional reference to the value behind the pointer | 
 |    = note: read the documentation for `<*const T>::as_ref` and ensure you satisfy its safety preconditions before calling it to avoid undefined behavior: https://doc.rust-lang.org/std/primitive.pointer.html#method.as_ref | 
 |    = note: the following trait bounds were not satisfied: | 
 |            `*const u8: std::fmt::Display` | 
 |            which is required by `*const u8: ToString` | 
 |  | 
 | error[E0599]: `*mut u8` doesn't implement `std::fmt::Display` | 
 |   --> $DIR/suggest-convert-ptr-to-ref.rs:8:22 | 
 |    | | 
 | LL |     println!("{}", t.to_string()); | 
 |    |                      ^^^^^^^^^ method cannot be called on `*mut u8` due to unsatisfied trait bounds | 
 |    | | 
 | note: the method `to_string` exists on the type `&&mut u8` | 
 |   --> $SRC_DIR/alloc/src/string.rs:LL:COL | 
 |    = note: you might want to use the unsafe method `<*mut T>::as_ref` to get an optional reference to the value behind the pointer | 
 |    = note: read the documentation for `<*mut T>::as_ref` and ensure you satisfy its safety preconditions before calling it to avoid undefined behavior: https://doc.rust-lang.org/std/primitive.pointer.html#method.as_ref-1 | 
 |    = note: the following trait bounds were not satisfied: | 
 |            `*mut u8: std::fmt::Display` | 
 |            which is required by `*mut u8: ToString` | 
 |  | 
 | error[E0599]: no method named `make_ascii_lowercase` found for raw pointer `*mut u8` in the current scope | 
 |   --> $DIR/suggest-convert-ptr-to-ref.rs:9:7 | 
 |    | | 
 | LL |     t.make_ascii_lowercase(); | 
 |    |       ^^^^^^^^^^^^^^^^^^^^ method not found in `*mut u8` | 
 |    | | 
 | note: the method `make_ascii_lowercase` exists on the type `&mut u8` | 
 |   --> $SRC_DIR/core/src/num/mod.rs:LL:COL | 
 |    = note: you might want to use the unsafe method `<*mut T>::as_mut` to get an optional reference to the value behind the pointer | 
 |    = note: read the documentation for `<*mut T>::as_mut` and ensure you satisfy its safety preconditions before calling it to avoid undefined behavior: https://doc.rust-lang.org/std/primitive.pointer.html#method.as_mut | 
 |  | 
 | error[E0599]: no method named `as_mut_ref` found for raw pointer `*mut u8` in the current scope | 
 |   --> $DIR/suggest-convert-ptr-to-ref.rs:12:15 | 
 |    | | 
 | LL |     let _ = t.as_mut_ref(); | 
 |    |               ^^^^^^^^^^ | 
 |    | | 
 | help: there is a method `as_mut` with a similar name | 
 |    | | 
 | LL -     let _ = t.as_mut_ref(); | 
 | LL +     let _ = t.as_mut(); | 
 |    | | 
 |  | 
 | error[E0599]: no method named `as_ref_mut` found for raw pointer `*mut u8` in the current scope | 
 |   --> $DIR/suggest-convert-ptr-to-ref.rs:13:15 | 
 |    | | 
 | LL |     let _ = t.as_ref_mut(); | 
 |    |               ^^^^^^^^^^ | 
 |    | | 
 | help: there is a method `as_mut` with a similar name | 
 |    | | 
 | LL -     let _ = t.as_ref_mut(); | 
 | LL +     let _ = t.as_mut(); | 
 |    | | 
 |  | 
 | error[E0599]: no method named `make_ascii_lowercase` found for raw pointer `*const u8` in the current scope | 
 |   --> $DIR/suggest-convert-ptr-to-ref.rs:16:7 | 
 |    | | 
 | LL |     z.make_ascii_lowercase(); | 
 |    |       ^^^^^^^^^^^^^^^^^^^^ method not found in `*const u8` | 
 |  | 
 | error: aborting due to 6 previous errors | 
 |  | 
 | For more information about this error, try `rustc --explain E0599`. |