Repository: rust
Issue: cargo clippy failed to apply fixes
Labels: C-bug,A-clippy

I'm sorry, but I don't have enough knowledge to identify and solve this problem. I have searched existing issues, but I couldn't find any relevant reports (it's possible that there are too many issues to locate). Therefore, I am submitting this issue here according to the instructions in the error message.

Clippy: clippy 0.1.70 (90c5418 2023-05-31)
Rustc: rustc 1.70.0 (90c541806 2023-05-31) 

Code
```rust
struct Type(i64);

impl Into<i64> for Type {
    fn into(self: Self) -> i64 {
        self.0
    }
}

fn main() {
    println!("Hello, world!");
}
```

Message
```
warning: failed to automatically apply fixes suggested by rustc to crate `test_clippy`

after fixes were automatically applied the compiler reported errors within these files:

  * src/main.rs

This likely indicates a bug in either rustc or cargo itself,
and we would appreciate a bug report! You're likely to see 
a number of compiler warnings after this message which cargo
attempted to fix but failed. If you could open an issue at
https://github.com/rust-lang/rust/issues
quoting the full output of this command we'd be very appreciative!
Note that you may be able to make some more progress in the near-term
fixing code with the `--broken-code` flag

The following errors were reported:
error: expected parameter name, found `:`
 --> src/main.rs:4:22
  |
4 |     fn from(val: Type: Self) -> Self {
  |                      ^ expected parameter name

error: expected one of `!`, `(`, `)`, `+`, `,`, `::`, or `<`, found `:`
 --> src/main.rs:4:22
  |
4 |     fn from(val: Type: Self) -> Self {
  |                      ^
  |                      |
  |                      expected one of 7 possible tokens
  |                      help: missing `,`

warning: consider choosing a more descriptive name
 --> src/main.rs:4:18
  |
4 |     fn from(val: Type: Self) -> Self {
  |                  ^^^^^^^^^^
  |
  = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#just_underscores_and_digits
  = note: `#[warn(clippy::just_underscores_and_digits)]` on by default

error[E0050]: method `from` has 2 parameters but the declaration in trait `std::convert::From::from` has 1
 --> src/main.rs:4:18
  |
4 |     fn from(val: Type: Self) -> Self {
  |                  ^^^^^^^^^^ expected 1 parameter, found 2
  |
  = note: `from` from trait: `fn(T) -> Self`

error: aborting due to 3 previous errors; 1 warning emitted

For more information about this error, try `rustc --explain E0050`.
Original diagnostics will follow.

warning: the type of the `self` parameter does not need to be arbitrary
 --> src/main.rs:4:13
  |
4 |     fn into(self: Self) -> i64 {
  |             ^^^^^^^^^^ help: consider to change this parameter to: `self`
  |
  = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_arbitrary_self_type
  = note: `#[warn(clippy::needless_arbitrary_self_type)]` on by default

warning: an implementation of `From` is preferred since it gives you `Into<_>` for free where the reverse isn't true
 --> src/main.rs:3:1
  |
3 | impl Into<i64> for Type {
  | ^^^^^^^^^^^^^^^^^^^^^^^
  |
  = help: `impl From<Local> for Foreign` is allowed by the orphan rules, for more information see
          https://doc.rust-lang.org/reference/items/implementations.html#trait-implementation-coherence
  = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#from_over_into
  = note: `#[warn(clippy::from_over_into)]` on by default
help: replace the `Into` implentation with `From<Type>`
  |
3 ~ impl From<Type> for i64 {
4 ~     fn from(val: Type: Self) -> Self {
5 ~         val.0
  |

warning: `test_clippy` (bin "test_clippy") generated 2 warnings (1 duplicate) (run `cargo clippy --fix --bin "test_clippy"` to apply 1 suggestion)
warning: `test_clippy` (bin "test_clippy" test) generated 2 warnings (1 duplicate) (run `cargo clippy --fix --bin "test_clippy" --tests` to apply 1 suggestion)
    Finished dev [unoptimized + debuginfo] target(s) in 0.11s
```