IndexOutOfBoundsException when using Google Indic Keyboard with RN 0.53.0

Is this a bug report?

Yes

Have you read the Contributing Guidelines?

Yes

Environment

Environment: OS: macOS High Sierra 10.13.2 Node: 8.4.0 Yarn: 0.27.5 npm: 5.3.0 Watchman: 4.9.0 Xcode: Xcode 9.2 Build version 9C40b Android Studio: 3.0 AI-171.4443003

Packages: (wanted => installed) react: 16.2.0 => 16.2.0 react-native: 0.53.0 => 0.53.0

Target Platform: Android (6.0.1)

Steps to Reproduce

1. Create and run a new project with RN 0.53.0, using react-native init. (Most likely exists for projects created using other methods as well, didn’t check.)
2. Switch the keyboard to Google Indic Keyboard from phone’s input settings
3. Steps for reproducing the crash with emojis: a. Create a TextInput with no additional props (or switch to the master branch of the provided repo). a. Type an emoji and press the backspace twice.
4. Steps for reproducing the crash with any character: a. Create a TextInput with autoCorrect={false} (or switch to the auto-correct branch of the provided repo). a. Type any character and press the backspace once.

Expected Behavior

The emojis and characters get cleared with no crashes

Actual Behavior

The app crashes on clearing the emojis, with no additional props set on the TextInput The app crashes on clearing the last character in case autoCorrect={false} is set

Reproducible Demo

https://github.com/SuhairZain/react-native-gindic-keyboard-crash The master branch crashes when deleting an emoji character The auto-correct branch crashes when deleting the last character in the input

The reason that I’ve created this issue here rather than on the Google Indic keyboard repo is that I can confirm that this bug does not exist with 0.47.1, which is the version our app was on before we upgraded. This is a bug that was introduced in one of the versions from then to 0.53.0.

[ccdwyer]

@joshyhargreaves Thanks! I built an APK with it and sent it over to my team.

[joshjhargreaves]

@ccdwyer no problem, I will do this evening as currently AFK!