[0.76] AccessibilityValue in View throws exception: "Exception in HostFunction: Loss of precision during arithmetic conversion: (long) "

[vincicat]

Description

Similar to react-native-elements/react-native-elements#3955 Sharcoux/slider#102 callstack/react-native-paper#4544, when any non-zero value is given to AccessibilityValue.now on Android & iOS, conversion occurs and an exception will be thrown.

(remark: Using Math.round() to avoid any (long) value will fix the issue temporarily.)

Both Expo (0.52) and bare React Native App (0.76.1 + SDK 34, 0.76.2 + SDK 35) can reproduce the bug. Expo 0.51 will not, so it is very likely related to New Architecture.

Same issue found in iOS 18 in some cases, but expo demo can show that

Steps to reproduce

1. go to demo
2. switch to Android/iOS and make sure expo == 0.52
3. click "Start Progress" to see the crash

React Native Version

0.76.2

Affected Platforms

Runtime - Android
Runtime - iOS

Areas

Fabric - The New Renderer

Output of npx react-native info

Binaries:
  Node:
    version: 23.1.0
    path: /opt/homebrew/bin/node
  Yarn:
    version: 3.6.4
    path: /opt/homebrew/bin/yarn
  npm:
    version: 10.9.0
    path: /opt/homebrew/bin/npm
  Watchman:
    version: 2024.11.04.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.16.2
    path: /opt/homebrew/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 24.1
      - iOS 18.1
      - macOS 15.1
      - tvOS 18.1
      - visionOS 2.1
      - watchOS 11.1
  Android SDK: Not Found
IDEs:
  Android Studio: 2024.2 AI-242.23339.11.2421.12550806
  Xcode:
    version: 16.1/16B40
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.13
    path: /usr/bin/javac
  Ruby:
    version: 2.6.10
    path: /usr/bin/ruby
npmPackages:
  "@react-native-community/cli":
    installed: 15.0.0
    wanted: 15.0.0
  react:
    installed: 18.3.1
    wanted: 18.3.1
  react-native:
    installed: 0.76.1
    wanted: 0.76.1
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: true
  newArchEnabled: true

Stacktrace or Logs

Android:

Exception in HostFunction: Loss of precision during arithmetic conversion: (long) 0.00001

iOS:

Exception in HostFunction: Loss of precision during arithmetic conversion: (long long) 0.00001

Reproducer

https://snack.expo.dev/OEofab5meHPozAXyOQg6_

Screenshots and Videos

No response

[react-native-bot]

Tip

Newer version available: You are on a supported minor version, but it looks like there's a newer patch available - 0.76.2. 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.

[react-native-bot]

Tip

Newer version available: You are on a supported minor version, but it looks like there's a newer patch available - undefined. 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.

[DominicWrege]

I have the same issue on iOS too.

[okanisildar]

I also have this issue on iOS. Math.round() is not even a temporary solution if you need a value to be between 0 and 1 like my use case.

[DominicWrege]

I am using the @react-native-picker/picker which causes the crash.

[vincicat]

Tip

Newer version available: You are on a supported minor version, but it looks like there's a newer patch available - undefined. 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.

updated to 0.76.2, issue remains

[vincicat]

@DominicWrege @okanisildar
Sorry to hear that but I don't have that issue on iOS, see if you can isolate the issue with an expo snack demo for iOS

[zbynekjadrnicek]

I have the same error after update to SDK 52. I use ProgressBar from react native paper and when I set its progress ratio to decimals, like 0.123, it throws error. But progress=1 works well.

[okanisildar]

@vincicat you can check this expo snack.

[DominicWrege]

@vincicat

The floating-point item font size causes the crash in my case.

Snack example

[vincicat]

@vincicat

The floating-point item font size causes the crash in my case.

Snack example

Thank you.
I think your case should open another ticket in the library to see if that is the library issue (*very likely, as it is okay to use floating point number in style by changing font size in other component of the snack...)