Function gather_active_jobs_inner 

pub(crate) fn gather_active_jobs_inner<'tcx, K: Copy>(
    state: &QueryState<'tcx, K>,
    tcx: TyCtxt<'tcx>,
    make_frame: fn(TyCtxt<'tcx>, K) -> QueryStackFrame<QueryStackDeferred<'tcx>>,
    require_complete: bool,
    job_map_out: &mut QueryJobMap<'tcx>,
) -> Option<()>

Internal plumbing for collecting the set of active jobs for this query.

Should only be called from gather_active_jobs.