error[E0308]: mismatched types
  --> $DIR/issue-52820.rs:12:9
   |
LL |         guts,
   |         ^^^^ expected struct `String`, found `&str`
   |
help: try using a conversion method
   |
LL |         guts: guts.to_string(),
   |         +++++     ++++++++++++

error[E0308]: mismatched types
  --> $DIR/issue-52820.rs:13:17
   |
LL |         brains: guts.clone(),
   |                 ^^^^^-----^^
   |                 |    |
   |                 |    help: try using a conversion method: `to_string`
   |                 expected struct `String`, found `&str`

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0308`.