Function lint

pub(super) fn lint<'tcx, L>(
    tcx: TyCtxtAt<'tcx>,
    machine: &CompileTimeMachine<'tcx>,
    lint: &'static Lint,
    decorator: impl FnOnce(Vec<FrameNote>) -> L,
)
where
    L: for<'a> LintDiagnostic<'a, ()>,

Emit a lint from a const-eval situation, with a backtrace.