error: expected item, found `;`
  --> $DIR/issue-49040.rs:1:28
   |
LL | #![allow(unused_variables)];
   |                            ^
   |
help: remove this semicolon
   |
LL - #![allow(unused_variables)];
LL + #![allow(unused_variables)]
   |

error[E0601]: `main` function not found in crate `issue_49040`
  --> $DIR/issue-49040.rs:2:12
   |
LL | fn foo() {}
   |            ^ consider adding a `main` function to `$DIR/issue-49040.rs`

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0601`.