error[E0271]: type mismatch resolving `<Histogram<u64> as BuildMetric>::Builder == MetricBuilder`
 --> tests/ui/metrics/missing_buckets.rs:6:16
  |
6 |     histogram: Histogram<u64>,
  |                ^^^^^^^^^ expected `MetricBuilder<Buckets>`, found `MetricBuilder`
  |
  = note: expected struct `MetricBuilder<Buckets>`
             found struct `MetricBuilder<()>`