i0 = i
				keepType = false
			}
		} else {
			if i0 >= 0 {
				// end of a run
				populate(i0, i, keepType)
				i0 = -1
			}
		}
		if t.Type != nil {
			keepType = true
		}
	}
	if i0 >= 0 {
		// end of a run
		populate(i0, len(specs), keepType)
	}

	return m
}