Nested columnar dictionary seems to fail

[gordonwatts]

This query fails:

llp_particles = (ds_dijet.Select(lambda e: e.Jets(uncalibrated_collection=jets_antikt_name))
    .Select(lambda e: e.Where(lambda p: p.pt()/1000.0 > 5))
    .Select(lambda e: {
        'pt': e.Select(lambda p: p.pt()/1000.0),
        'eta': e.Select(lambda p: p.eta()),
    })
    # .Select(lambda e: e.Select(lambda p: p.eta()))
#    .Select(lambda e: e.Where(lambda p: p.pdgId() == 1000022))
    # .Select(lambda e: {
    #     'pt': e.Select(lambda p: p.pt()/1000.0),
    #     'eta': e.Select(lambda p: p.eta()),
    #     'phi': e.Select(lambda p: p.phi()),
    # })
    .AsAwkwardArray()
    .value()
)

The errors back from SX are not at all clear what is going on.