Describe what you were doing when the bug occurred:
1. Started profiling the application
2. Tried to stop it after couple of navigation and actions on spa, but failed to stop.
3. Finally clicking multiple times on Stop has stopped profiling, and got his issue in graph option

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DevTools version: 4.6.0-6cceaeb67

Call stack: at chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:40:167472
    at Map.forEach (<anonymous>)
    at commitIndex (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:40:167418)
    at e.getRankedChartData (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:40:167941)
    at lc (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:40:342270)
    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)

Component stack: in lc
    in div
    in div
    in div
    in So
    in Unknown
    in n
    in Unknown
    in div
    in div
    in rl
    in Ze
    in fn
    in Ga
    in _s
return alternate;
    }
    primaryFibers.add(fiber);
    return fiber;
  }
  const fiberToIDMap: Map<Fiber, number> = new Map();
  const idToFiberMap: Map<number, Fiber> = new Map();
  const primaryFibers: Set<Fiber> = new Set();
   When profiling is supported, we store the latest tree base durations for each Fiber.
   This is so that we can quickly capture a snapshot of those values if profiling starts.
   If we didn't store these values, we'd have to crawl the tree when profiling started,
   and use a slow path to find each of the current Fibers.
  const idToTreeBaseDurationMap: Map<number, number> = new Map();
   When profiling is supported, we store the latest tree base durations for each Fiber.
   This map enables us to filter these times by root when sending them to the frontend.
  const idToRootMap: Map<number, number> = new Map();
   When a mount or update is in progress, this value tracks the root that is being operated on.
  let currentRootID: number = -1;
  function getFiberID(primaryFiber: Fiber): number {
    if (!fiberToIDMap.has(primaryFiber)) {
      const id = getUID();
      fiberToIDMap.set(primaryFiber, id);
      idToFiberMap.set(id, primaryFiber);
    }
    return ((fiberToIDMap.get(primaryFiber): any): number);
  }
  function getChangeDescription(
    prevFiber: Fiber | null,
    nextFiber: Fiber,
  ): ChangeDescription | null {