Describe what you were doing when the bug occurred:
1. Add interaction tracing with unstable_trace
2. Record a profile, navigate to Profiler > Profiled Interactions
3. Error appears when scrolling view or immediately

![Kapture 2020-05-01 at 8 37 44](https://user-images.githubusercontent.com/131928/80805899-3688c400-8b87-11ea-88ca-3a7ae7de3589.gif)
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DevTools version: 4.6.0-6cceaeb67

Call stack: at chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:40:344360
    at Array.map (<anonymous>)
    at chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:40:344166
    at ci (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:32:59620)
    at Ll (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:32:109960)
    at qc (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:32:102381)
    at Hc (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:32:102306)
    at Vc (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:32:102171)
    at Tc (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:32:98781)
    at chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:32:46014

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dataForRoots.set(rootID, {
          commitData: filteredCommitData,
          displayName,
          initialTreeBaseDurations: new Map(initialTreeBaseDurations),
          interactionCommits: new Map(interactionCommits),
          interactions: new Map(interactions),
          operations: filteredOperations,
          rootID,
          snapshots,
        });
      },
    );
  });
  return {dataForRoots};
}
export function prepareProfilingDataFrontendFromExport(
  profilingDataExport: ProfilingDataExport,
): ProfilingDataFrontend {
  const {version} = profilingDataExport;
  if (version !== PROFILER_EXPORT_VERSION) {
    throw Error(`Unsupported profiler export version "${version}"`);
  }
  const dataForRoots: Map<number, ProfilingDataForRootFrontend> = new Map();
  profilingDataExport.dataForRoots.forEach(
    ({
      commitData,
      displayName,
      initialTreeBaseDurations,
      interactionCommits,
      interactions,