Rocket/core/codegen/tests/ui-fail/async-entry.stderr

error: attribute can only be applied to `async` functions
 --> $DIR/async-entry.rs:6:5
  |
6 |     #[rocket::main]
  |     ^^^^^^^^^^^^^^^
  |
note: this function must be `async`
 --> $DIR/async-entry.rs:7:5
  |
7 |     fn foo() { }
  |     ^^^^^^^^
  = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

warning: attribute is typically applied to `main` function
  --> $DIR/async-entry.rs:12:5
   |
12 |     #[rocket::main]
   |     ^^^^^^^^^^^^^^^
   |
note: this function is not `main`
  --> $DIR/async-entry.rs:13:5
   |
13 |     async fn foo() { }
   |     ^^^^^^^^^^^^^^
   = note: this warning originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: attribute can only be applied to `async` functions
  --> $DIR/async-entry.rs:18:5
   |
18 |     #[rocket::main]
   |     ^^^^^^^^^^^^^^^
   |
note: this function must be `async`
  --> $DIR/async-entry.rs:19:5
   |
19 |     fn main() {
   |     ^^^^^^^^^
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: attribute cannot be applied to `main` function
  --> $DIR/async-entry.rs:55:5
   |
55 |     #[rocket::launch]
   |     ^^^^^^^^^^^^^^^^^
   |
   = note: this attribute generates a `main` function
note: this function cannot be `main`
  --> $DIR/async-entry.rs:56:5
   |
56 |     fn main() -> rocket::Rocket {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: attribute can only be applied to functions that return a value
  --> $DIR/async-entry.rs:63:5
   |
63 |     #[rocket::launch]
   |     ^^^^^^^^^^^^^^^^^
   |
note: this function must return a value
  --> $DIR/async-entry.rs:64:5
   |
64 |     async fn rocket() {
   |     ^^^^^^^^^^^^^^^^^
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: attribute can only be applied to functions that return a value
  --> $DIR/async-entry.rs:72:5
   |
72 |     #[rocket::launch]
   |     ^^^^^^^^^^^^^^^^^
   |
note: this function must return a value
  --> $DIR/async-entry.rs:73:5
   |
73 |     fn rocket() {
   |     ^^^^^^^^^^^
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: attribute cannot be applied to `main` function
  --> $DIR/async-entry.rs:89:5
   |
89 |     #[rocket::launch]
   |     ^^^^^^^^^^^^^^^^^
   |
   = note: this attribute generates a `main` function
note: this function cannot be `main`
  --> $DIR/async-entry.rs:90:5
   |
90 |     fn main() -> &'static str {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: attribute cannot be applied to `main` function
  --> $DIR/async-entry.rs:98:5
   |
98 |     #[rocket::launch]
   |     ^^^^^^^^^^^^^^^^^
   |
   = note: this attribute generates a `main` function
note: this function cannot be `main`
  --> $DIR/async-entry.rs:99:5
   |
99 |     async fn main() -> rocket::Rocket {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0728]: `await` is only allowed inside `async` functions and blocks
  --> $DIR/async-entry.rs:82:17
   |
81 |     fn rocket() -> rocket::Rocket {
   |        ------ this is not `async`
82 |         let _ = rocket::ignite().launch().await;
   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ only allowed inside `async` functions and blocks

error[E0308]: mismatched types
  --> $DIR/async-entry.rs:40:9
   |
40 |         rocket::ignite()
   |         ^^^^^^^^^^^^^^^^ expected struct `std::string::String`, found struct `rocket::rocket::Rocket`

error[E0308]: mismatched types
  --> $DIR/async-entry.rs:49:9
   |
49 |         "hi".to_string()
   |         ^^^^^^^^^^^^^^^^ expected struct `rocket::rocket::Rocket`, found struct `std::string::String`

error[E0308]: mismatched types
  --> $DIR/async-entry.rs:27:21
   |
27 |       async fn main() {
   |                       ^ expected `()` because of default return type
   |  _____________________|
   | |
28 | |         //~^ ERROR mismatched types
29 | |         rocket::ignite()
30 | |     }
   | |     ^- help: try adding a semicolon: `;`
   | |_____|
   |       expected `()`, found struct `rocket::rocket::Rocket`

error[E0308]: mismatched types
  --> $DIR/async-entry.rs:37:26
   |
37 |     async fn rocket() -> String {
   |                          ^^^^^^
   |                          |
   |                          expected struct `rocket::rocket::Rocket`, found struct `std::string::String`
   |                          expected due to this

error[E0277]: `main` has invalid return type `rocket::rocket::Rocket`
   --> $DIR/async-entry.rs:106:20
    |
106 | async fn main() -> rocket::Rocket {
    |                    ^^^^^^^^^^^^^^ `main` can only return types that implement `std::process::Termination`
    |
    = help: consider using `()`, or a `Result`

error: aborting due to 13 previous errors; 1 warning emitted

Some errors have detailed explanations: E0277, E0308, E0728.
For more information about an error, try `rustc --explain E0277`.