$ cargo run
   Compiling ownership v0.1.0 (file:///projects/ownership)
error[E0106]: missing lifetime specifier
 --> src/main.rs:5:16
  |
5 | fn dangle() -> &String {
  |                ^ expected named lifetime parameter
  |
  = help: this function's return type contains a borrowed value, but there is no value for it to be borrowed from
help: consider using the `'static` lifetime, but this is uncommon unless you're returning a borrowed value from a `const` or a `static`
  |
5 | fn dangle() -> &'static String {
  |                 +++++++
help: instead, you are more likely to want to return an owned value
  |
5 - fn dangle() -> &String {
5 + fn dangle() -> String {
  |

error[E0515]: cannot return reference to local variable `s`
 --> src/main.rs:8:5
  |
8 |     &s
  |     ^^ returns a reference to data owned by the current function

Some errors have detailed explanations: E0106, E0515.
For more information about an error, try `rustc --explain E0106`.
error: could not compile `ownership` (bin "ownership") due to 2 previous errors