warning: denote infinite loops with `loop { ... }`
  --> $DIR/issue-27042.rs:8:9
   |
LL | /         'b:
LL | |
LL | |         while true { break }; // but here we cite the whole loop
   | |__________________^ help: use `loop`
   |
   = note: `#[warn(while_true)]` on by default

error[E0308]: mismatched types
  --> $DIR/issue-27042.rs:6:16
   |
LL |     let _: i32 =
   |         - expected because of this assignment
LL |         'a: // in this case, the citation is just the `break`:
LL |         loop { break };
   |         ----   ^^^^^ expected `i32`, found `()`
   |         |
   |         this loop is expected to be of type `i32`
   |
help: give the `break` a value of the expected type
   |
LL |         loop { break 42 };
   |                      ++

error[E0308]: mismatched types
  --> $DIR/issue-27042.rs:8:9
   |
LL |       let _: i32 =
   |              --- expected due to this
LL | /         'b:
LL | |
LL | |         while true { break }; // but here we cite the whole loop
   | |____________________________^ expected `i32`, found `()`

error[E0308]: mismatched types
  --> $DIR/issue-27042.rs:12:9
   |
LL | /         'c:
LL | |         for _ in None { break }; // but here we cite the whole loop
   | |_______________________________^ expected `i32`, found `()`
   |
   = note: `for` loops evaluate to unit type `()`

error[E0308]: mismatched types
  --> $DIR/issue-27042.rs:15:9
   |
LL |       let _: i32 =
   |              --- expected due to this
LL | /         'd:
LL | |         while let Some(_) = None { break };
   | |__________________________________________^ expected `i32`, found `()`

error: aborting due to 4 previous errors; 1 warning emitted

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