Describe what you were doing when the bug occurred:
1. I was using the devtools to investigate some performance issues w/ an app I help maintain
2. I had just turned on the "Record why each component rendered while profiling" checkbox
3. I ran a profile while navigating on the underlying page

The react profiler tab in the devtools gave this error, I think as I clicked the record icon to stop recording the profile.

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DevTools version: 4.5.0-355970aa4

Call stack: at N (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:40:160881)
    at j (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:40:160015)
    at j (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:40:159939)
    at j (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:40:159939)
    at j (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:40:159939)
    at j (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:40:159939)
    at j (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:40:159939)
    at j (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:40:159939)
    at j (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:40:159939)
    at j (chrome-extension://fmkadmapgofadopljbjfkapdkoienihi/build/main.js:40:159939)

Component stack: in ec
    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
if (prevDidTimeout && nextDidTimeOut) {
       F
       1
      const nextFiberChild = nextFiber.child;
      const nextFallbackChildSet = nextFiberChild
        ? nextFiberChild.sibling
        : null;
       N
       b
      const prevFiberChild = prevFiber.child;
      const prevFallbackChildSet = prevFiberChild
        ? prevFiberChild.sibling
        : null;
      if (
        nextFallbackChildSet != null &&
        prevFallbackChildSet != null &&
        updateFiberRecursively(
          nextFallbackChildSet,
          prevFallbackChildSet,
          nextFiber,
          traceNearestHostComponentUpdate,
        )
      ) {
        shouldResetChildren = true;
      }
    } else if (prevDidTimeout && !nextDidTimeOut) {
       F
       1
       N
       2