Function code_scanning_licence_refusal 

pub fn code_scanning_licence_refusal(
    provider: Option<Provider>,
    driver: Option<&str>,
    shape: &CrateShape,
) -> Option<String>

Why the code scanning capability’s licence condition refuses this target, or None where no condition applies or the licence satisfies it.

Only codeql carries a condition: its terms cover an open-source codebase, and a run over anything else needs a paid seat, so a landing that guessed would write a licence violation. Semgrep CE carries none, and is the fallback the refusal names.

The licence is read where the binding declares it. For rust that is the license field of Cargo.toml. A manifest that names a license-file instead states no identifier this judgment can read, so the pair refuses rather than guessing at the file’s contents.