worklet doesn't execute it's full body

Description

According to my understanding this code https://gist.github.com/likern/7599926cdda1d4a5edd221a2630a44af should rerender component 1000 times.

And I have to see worklet: onFinish is called; index is 1000 in logs.

But, sometimes I see that worklet doesn’t work as expected.

It started executing and then suddenly just stops executing it’s body.

worklet: function start is the last log message. That means worklet started executing and then suddenly stopped at all.

[Tue Sep 01 2020 17:26:20.844]  LOG      [MeasureLayout] index [8], props: {"message":"8"}
[Tue Sep 01 2020 17:26:20.848]  LOG      useEffect: before runOnUI
[Tue Sep 01 2020 17:26:20.848]  LOG      useEffect: after runOnUI
[Tue Sep 01 2020 17:26:20.850]  LOG      worklet: function start

while in worklet code there is unconditional next console.log should be executed:

console.log('worklet: function start');
const onLayoutWasCalled = getIsOnLayoutCalled();
console.log(`worklet: onLayoutWasCalled is ${onLayoutWasCalled}`);

Steps To Reproduce

Reproducing code https://gist.github.com/likern/7599926cdda1d4a5edd221a2630a44af

Expected behavior

Worklet should always execute it’s full body.

Actual behavior

Worklet stops executing it’s body.

Package versions

• React: 16.11.0
• React Native: 0.62.2
• React Native Reanimated: 2.0.0-alpha.5

[terrysahaidak]

I’m pretty sure you guys are using different versions of Reanimated that’s why you have different results. @likern I would wait until alpha.6 is released or use the master branch (at least for iOS).

[likern]

@likern any update?

Will try today

Okay, thank you

I’ve run multiple times and couldn’t catch this bug again on 2.0.0-alpha.6. Everything is working as expected.