iOS Crash: [nullthrows] "Got unexpected undefined" in UIManager.measureInWindow

[jgillick]

Description

I am seeing app crash reports on iOS with the error:

Got unexpected undefined

The stacktrace shows that it comes from this line in UIManager.measureInWindow:
https://github.com/facebook/react-native/blob/v0.72.6/packages/react-native/Libraries/ReactNative/UIManager.js#L88

This implies that the method getFabricUIManager() returns undefined.

My app has fabric disabled.

Full stack track:

Error Got unexpected undefined 
    Users/runner/work/together/together/packages/dating-app/node_modules/nullthrows/nullthrows.js:7:23 nullthrows
    Users/runner/work/together/together/packages/dating-app/node_modules/react-native/Libraries/ReactNative/UIManager.js:88:40 measureInWindow
    Users/runner/work/together/together/packages/dating-app/node_modules/@ui-kitten/components/devsupport/components/measure/measure.component.js:60:48 measureSelf
    Users/runner/work/together/together/packages/dating-app/node_modules/@ui-kitten/components/devsupport/components/measure/measure.component.js:50:23 onUIManagerMeasure
    (native) apply
    Users/runner/work/together/together/packages/dating-app/node_modules/react-native/Libraries/BatchedBridge/MessageQueue.js:474:12 __invokeCallback
    Users/runner/work/together/together/packages/dating-app/node_modules/react-native/Libraries/BatchedBridge/MessageQueue.js:124:27 anonymous
    Users/runner/work/together/together/packages/dating-app/node_modules/react-native/Libraries/BatchedBridge/MessageQueue.js:368:10 __guard
    Users/runner/work/together/together/packages/dating-app/node_modules/react-native/Libraries/BatchedBridge/MessageQueue.js:123:16 invokeCallbackAndReturnFlushedQueue

Interestingly, the main branch looks like it might not be much better. nativeFabricUIManagerProxy seems to be initialized to undefined (see code), however, the code will only define a value for it if it is null. (see code). However, I could be misreading ithis.

React Native Version

0.71.6

Output of npx react-native info

System:
OS: macOS 14.1.1
CPU: (8) arm64 Apple M2
Memory: 194.55 MB / 24.00 GB
Shell:
version: 3.6.1
path: /opt/homebrew/bin/fish
Binaries:
Node:
version: 18.18.2
path: /usr/local/bin/node
Yarn:
version: 3.6.1
path: /usr/local/bin/yarn
npm:
version: 9.8.1
path: /usr/local/bin/npm
Watchman:
version: 2023.10.09.00
path: /opt/homebrew/bin/watchman
Managers:
CocoaPods:
version: 1.13.0
path: /Users/jeremy/.rbenv/shims/pod
SDKs:
iOS SDK:
Platforms:
- DriverKit 23.0
- iOS 17.0
- macOS 14.0
- tvOS 17.0
- watchOS 10.0
Android SDK: Not Found
IDEs:
Android Studio: 2022.3 AI-223.8836.35.2231.10811636
Xcode:
version: 15.0.1/15A507
path: /usr/bin/xcodebuild
Languages:
Java:
version: 16.0.1
path: /usr/bin/javac
Ruby:
version: 3.2.2
path: /Users/jeremy/.rbenv/shims/ruby
npmPackages:
"@react-native-community/cli": Not Found
react:
installed: 18.2.0
wanted: 18.2.0
react-native:
installed: 0.72.6
wanted: 0.72.6
react-native-macos: Not Found
npmGlobalPackages:
"react-native": Not Found
Android:
hermesEnabled: true
newArchEnabled: false
iOS:
hermesEnabled: true
newArchEnabled: false

Steps to reproduce

I have not been able to reproduce it directly and am just going by the stack traces from the crash reports.

Snack, screenshot, or link to a repository

Unfortunately, I have not been able to create a reproduction directly.

[github-actions]

⚠️	Missing Reproducible Example
ℹ️	We could not detect a reproducible example in your issue report. Please provide either: If your bug is UI related: a Snack If your bug is build/update related: use our Reproducer Template. A reproducer needs to be in a GitHub repository under your username.

[github-actions]

⚠️

Newer Version of React Native is Available!

ℹ️

You are on a supported minor version, but it looks like there's a newer patch available - 0.71.14. Please upgrade to the highest patch for your minor or latest and verify if the issue persists (alternatively, create a new project and repro the issue in it). If it does not repro, please let us know so we can close out this issue. This helps us ensure we are looking at issues that still exist in the most recent releases.

[cortinico]

Unfortunately, I have not been able to create a reproduction directly.

Without a repro we can't really help

[jgillick]

After further investigation, it looks like the library which calls measureInWindow (UI Kitten) already has a proposed fix (akveo/react-native-ui-kitten#1790) on their end. So I'm closing this issue.