CI Failure

[github-actions]

Scheduled CI run failed. Details:

https://github.com/rust-embedded/cortex-m/actions/runs/26680943490

[jonathanpallant]

unexpected errors (from JSON output): [
    Error {
        line_num: 15,
        kind: Some(
            Error,
        ),
        msg: "15:4: 15:15: no variant, associated function, or constant named `SecureFault` found for enum `cortex_m_rt::Exception` in the current scope [E0599]",
    },
]

not found errors (from test file): [
    Error {
        line_num: 15,
        kind: Some(
            Error,
        ),
        msg: "no variant or associated item named `SecureFault`",
    },
]

Looks like rustc output format changing? Don't we have a pinned copy of rustc for these tests?

[adamgreig]

We run the scheduled tests against stable to catch this sort of stable-to-stable changes in error messages (so we can update the tests). Fixed in #662.