error[E0308]: mismatched types
  --> $DIR/issue-52820.rs:9:9
   |
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:10:17
   |
LL |         brains: guts.clone(),
   |                 ^^^^^^^^^^^^
   |                 |
   |                 expected struct `String`, found `&str`
   |                 help: try using a conversion method: `guts.to_string()`

error: aborting due to 2 previous errors

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