message: NO-TICKET: fix potential panic in ScopedInstrumenter::drop
diff: @@ -78,7 +78,10 @@ impl ScopedInstrumenter {
  }
  fn duration(&self) -> Duration {
  - self.start.elapsed() - self.pause_state.duration()
  + self.start
  + .elapsed()
  + .checked_sub(self.pause_state.duration())
  + .unwrap_or_default()
  }
  }
  