Calling `ReactDefaultPerf.printWasted()` results in:

```
Uncaught TypeError: Cannot read property 'forEach' of undefined
writes.(anonymous function).forEach @ ReactDefaultPerfAnalysis.js:195
Object.keys.forEach @ ReactDefaultPerfAnalysis.js:192
getUnchangedComponents @ ReactDefaultPerfAnalysis.js:191
getInclusiveSummary @ ReactDefaultPerfAnalysis.js:139
ReactDefaultPerf.getMeasurementsSummaryMap @ ReactDefaultPerf.js:118
ReactDefaultPerf.printWasted @ ReactDefaultPerf.js:133
```

(this is on a page internally at Facebook so I assume it's a fairly recent React version)

var candidates = {};
  var inclusiveKey;
  for (var i = 0; i < measurements.length; i++) {
    var measurement = measurements[i];
    var allIDs = Object.assign(
      {},
      measurement.exclusive,
      measurement.inclusive
    );
    var cleanComponents;
    if (onlyClean) {
      cleanComponents = getUnchangedComponents(measurement);
    }
    for (var id in allIDs) {
      if (onlyClean && !cleanComponents[id]) {
        continue;
      }
      var displayName = measurement.displayNames[id];
      
      
      
      inclusiveKey = displayName.owner + ' > ' + displayName.current;
      candidates[inclusiveKey] = candidates[inclusiveKey] || {
        componentName: inclusiveKey,
        time: 0,
        count: 0,
      };