Typo detection for "const" works in `const fn` but not in `pub const fn`

[AccessViolation95]

Code

pub struct Thing {
    octets: [u8; 8],
}

impl Thing {
    pub contst fn octets(&self) -> [u8; 8] {
        self.octets
    }
}

Current output

Compiling playground v0.0.1 (/playground)
error: visibility `pub` is not followed by an item
 --> src/lib.rs:6:5
  |
6 |     pub contst fn octets(&self) -> [u8; 8] {
  |     ^^^ the visibility
  |
  = help: you likely meant to define an item, e.g., `pub fn foo() {}`

error: non-item in item list
 --> src/lib.rs:6:9
  |
5 | impl Thing {
  |            - item list starts here
6 |     pub contst fn octets(&self) -> [u8; 8] {
  |         ^^^^^^ non-item starts here
...
9 | }
  | - item list ends here

error: could not compile `playground` (lib) due to 2 previous errors

Desired output

Compiling playground v0.0.1 (/playground)
error: visibility `pub` is not followed by an item
 --> src/lib.rs:6:5
  |
6 |     pub contst fn octets(&self) -> [u8; 8] {
  |     ^^^ the visibility
  |
  = help: you likely meant to define an item, e.g., `pub fn foo() {}`

error: non-item in item list
 --> src/lib.rs:6:9
  |
5 | impl Thing {
  |            - item list starts here
6 |     pub contst fn octets(&self) -> [u8; 8] {
  |         ^^^^^^ non-item starts here
...
9 | }
  | - item list ends here
help: there is a keyword `const` with a similar name
  |
6 -     pub contst fn octets(&self) -> [u8; 8] {
6 +     pub const fn octets(&self) -> [u8; 8] {
  |

error: could not compile `playground` (lib) due to 2 previous errors

Rationale and extra context

No response

Other cases

pub struct Thing {
    octets: [u8; 8],
}

impl Thing {
    contst fn octets(&self) -> [u8; 8] {
        self.octets
    }
}

~~~~~~~~~~

   Compiling playground v0.0.1 (/playground)
error: expected one of `!` or `::`, found keyword `fn`
 --> src/lib.rs:6:12
  |
5 | impl Thing {
  |            - while parsing this item list starting here
6 |     contst fn octets(&self) -> [u8; 8] {
  |            ^^ expected one of `!` or `::`
...
9 | }
  | - the item list ends here
  |
help: there is a keyword `const` with a similar name
  |
6 -     contst fn octets(&self) -> [u8; 8] {
6 +     const fn octets(&self) -> [u8; 8] {
  |

error: could not compile `playground` (lib) due to 1 previous error

Rust Version

$ rustc --version --verbose
rustc 1.93.1 (01f6ddf75 2026-02-11)
binary: rustc
commit-hash: 01f6ddf7588f42ae2d7eb0a2f21d44e8e96674cf
commit-date: 2026-02-11
host: x86_64-unknown-linux-gnu
release: 1.93.1
LLVM version: 21.1.8

Anything else?

No response

[TusharSariya]

Hey i will take a look at this.

[mvanhorn]

I've submitted a fix for this in PR #153586. Adds keyword similarity checking to the visibility error path so pub contst fn now suggests const.

[AccessViolation95]

It seems the current assignee was banned for spamming

[AccessViolation95]

Hi @TaKO8Ki, I'm not sure if the state of this issue is broken because the assignee was blocked for spam after assigning themselves. Does the assignee need to be cleared for someone else to be able to take this on?

Edit: I just noticed no one is assigned. I had assumed nothing had changed regarding the issue's assignee because I saw no update of it in this thread. All seems fine, my bad!

[TaKO8Ki]

@AccessViolation95 Yeah. I unassigned the blocked user when I saw your comment.

[FranciscoTGouveia]

@rustbot claim