unclear diagnostic for when lifetimes are bound to static via error conversion

Code

use thiserror::Error; // 2.0.16
use anyhow;

#[derive(Error, Copy, Clone, Debug)]
#[error("something happened in {ctx:?}")]
struct MyError<'a>{
    ctx: &'a str,
}

fn frob(src: &str) -> anyhow::Result<u8> {
    Ok(frob_inner(src)?)
}

fn frob_inner(src: &str) -> Result<u8, MyError<'_>> {
    // TODO
    Err(MyError{
        ctx: src,
    })
}

Current output

error[E0521]: borrowed data escapes outside of function
  --> src/lib.rs:11:8
   |
10 | fn frob(src: &str) -> anyhow::Result<u8> {
   |         ---  - let's call the lifetime of this reference `'1`
   |         |
   |         `src` is a reference that is only valid in the function body
11 |     Ok(frob_inner(src)?)
   |        ^^^^^^^^^^^^^^^
   |        |
   |        `src` escapes the function body here
   |        argument requires that `'1` must outlive `'static`

For more information about this error, try `rustc --explain E0521`.
error: could not compile `playground` (lib) due to 1 previous error

Desired output

error[E0521]: borrowed data escapes outside of function
  --> src/lib.rs:11:8
   |
10 | fn frob(src: &str) -> anyhow::Result<u8> {
   |         ---  - let's call the lifetime of this reference `'1`
   |         |
   |         `src` is a reference that is only valid in the function body
11 |     Ok(frob_inner(src)?)
   |        ^^^^^^^^^^^^^^^
   |        |
   |        `src` escapes the function body here
   |        argument requires that `'1` must outlive `'static`
   = note: converting `MyError` to `anyhow::Result` requires that it is `'static`

For more information about this error, try `rustc --explain E0521`.
error: could not compile `playground` (lib) due to 1 previous error

Rationale and extra context

No response

Other cases

Rust Version

rustc 1.90.0 (1159e78c4 2025-09-14)
binary: rustc
commit-hash: 1159e78c4747b02ef996e55082b704c09b970588
commit-date: 2025-09-14
host: x86_64-unknown-linux-gnu
release: 1.90.0
LLVM version: 20.1.8

Anything else?

No response

Start with the Rust reproduction in src/lib.rs and compile it with the reported rustc version to confirm the current diagnostic. Trace how the error conversion produces the 'static requirement, then update the diagnostic so it includes the note shown under Desired output. Re-run the reproduction to verify the wording.