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**Do you want to request a *feature* or report a *bug*?**
Bug

**What is the current behavior?**
The profiler tab only shows this message even though I have a version greater than 16.5.

![Screen Shot 2019-09-06 at 13 26 47](https://user-images.githubusercontent.com/5483459/64444238-0d706c00-d0aa-11e9-8d32-810465a13433.png)


Something strange on the console is this message and just appears when the extension is active.

![Screen Shot 2019-09-06 at 13 25 17](https://user-images.githubusercontent.com/5483459/64444170-e74acc00-d0a9-11e9-8b7c-acaa31e50cea.png)

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**
React **16.9.0**
React DevTools **4.0.6-a39d9c3**

return ++uidCounter;
}
export function utfDecodeString(array: Array<number>): string {
  return String.fromCodePoint(...array);
}
export function utfEncodeString(string: string): Array<number> {
  let cached = encodedStringCache.get(string);
  if (cached !== undefined) {
    return cached;
  }
  const encoded = new Array(string.length);
  for (let i = 0; i < string.length; i++) {
    encoded[i] = string.codePointAt(i);
  }
  encodedStringCache.set(string, encoded);
  return encoded;
}
export function printOperationsArray(operations: Array<number>) {
  
  const rendererID = operations[0];
  const rootID = operations[1];
  const logs = [`opertions for renderer:${rendererID} and root:${rootID}`];
  let i = 2;
  
  const stringTable = [
    null, 
  ];