src/test/ui/issues/issue-21596.stderr

   1 error[E0599]: no method named `to_string` found for raw pointer `*const u8` in the current scope
   2   --> $DIR/issue-21596.rs:4:22
   3    |
   4 LL |     println!("{}", z.to_string());
   5    |                      ^^^^^^^^^ method not found in `*const u8`
   6    |
   7    = note: try using `<*const T>::as_ref()` to get a reference to the type behind the pointer: https://doc.rust-lang.org/std/primitive.pointer.html#method.as_ref
   8    = note: using `<*const T>::as_ref()` on a pointer which is unaligned or points to invalid or uninitialized memory is undefined behavior
   9    = note: the method `to_string` exists but the following trait bounds were not satisfied:
  10            `*const u8 : std::string::ToString`
  11
  12 error: aborting due to previous error
  13
  14 For more information about this error, try `rustc --explain E0599`.