error[E0308]: mismatched types
  --> $DIR/issue-84976.rs:15:16
   |
LL |     length = { foo(&length) };
   |                ^^^^^^^^^^^^ expected `u32`, found `i32`
   |
help: you can convert an `i32` to a `u32` and panic if the converted value doesn't fit
   |
LL |     length = { foo(&length).try_into().unwrap() };
   |                            ++++++++++++++++++++

error[E0308]: mismatched types
  --> $DIR/issue-84976.rs:17:14
   |
LL |     let mut length = 0;
   |                      - expected due to this value
...
LL |     length = foo(&length);
   |              ^^^^^^^^^^^^ expected `u32`, found `i32`

error[E0308]: mismatched types
  --> $DIR/issue-84976.rs:21:22
   |
LL |     float_length = { bar(&float_length) };
   |                      ^^^^^^^^^^^^^^^^^^ expected `f32`, found `f64`

error[E0308]: mismatched types
  --> $DIR/issue-84976.rs:23:20
   |
LL |     let mut float_length = 0.0;
   |                            --- expected due to this value
...
LL |     float_length = bar(&float_length);
   |                    ^^^^^^^^^^^^^^^^^^ expected `f32`, found `f64`

error: aborting due to 4 previous errors

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