Build error when integrating OneSignal following the Flutter SDK Setup guide

[iAmWillShepherd]

Description

I followed the getting started guide to get up and running with Flutter, but I get the following error when I attempt to run the app on the Android simulator.

I also want to call out step 6.1 as being ambiguous: there is no mention of where in the file the code should be (i.e. Line 1, or the end of the file, or somewhere in between).

Environment

1. Flutter 2.5.3
2. I followed this instruction

Repro steps

1. Follow the Flutter SDK Setup
2. Once at step 7, run the app on Android.

Misc.

Shell output when trying to run on Android

╭─iamwill@zues ~/code/random/onesignal_flutter_sample/ios 
╰─$ flutter run                                                                                                  1 ↵
Changing current working directory to: /Users/iamwill/code/random/onesignal_flutter_sample
Multiple devices found:
sdk gphone64 arm64 (mobile) • emulator-5554                        • android-arm64  • Android 12 (API 31) (emulator)
iPhone 13 Pro Max (mobile)  • C4C4AF46-1101-4FF5-B2D9-82655CDB49CA • ios            •
com.apple.CoreSimulator.SimRuntime.iOS-15-2 (simulator)
Chrome (web)                • chrome                               • web-javascript • Google Chrome 96.0.4664.55
[1]: sdk gphone64 arm64 (emulator-5554)
[2]: iPhone 13 Pro Max (C4C4AF46-1101-4FF5-B2D9-82655CDB49CA)
[3]: Chrome (chrome)
Please choose one (To quit, press "q/Q"): 1
Using hardware rendering with device sdk gphone64 arm64. If you notice graphics artifacts, consider enabling software
rendering with "--enable-software-rendering".
Launching lib/main.dart on sdk gphone64 arm64 in debug mode...
e: /Users/iamwill/.gradle/caches/transforms-2/files-2.1/a849fb59950567c1b835c07de721603e/work-runtime-2.6.0-api.jar!/META-INF/work-runtime_release.kotlin_module: Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.5.1, expected version is 1.1.15.

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:compileDebugKotlin'.
> Compilation error. See log for more details

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 13s
Running Gradle task 'assembleDebug'...                             14.2s
Exception: Gradle task assembleDebug failed with exit code 1

[emawby]

I managed to fix this by upgrading the kotlin version in build.gradle from

ext.kotlin_version = '1.3.50'

to

ext.kotlin_version = '1.4.32'

[iAmWillShepherd]

It appears that our Gradle plugin may be the culprit here. The comment above does work to unblock this issue, but we should fix our plugin to work with the default Kotlin version that flutter create defaults to.

[Not-Dhanraj]

I managed to fix this by upgrading the kotlin version in build.gradle from

ext.kotlin_version = '1.3.50'

to

ext.kotlin_version = '1.4.32'

I am currently using kotlin version- 1.6.10 but i am still getting same error.

[westy92]

Here's a related issue filed on the plugin repo: OneSignal/OneSignal-Gradle-Plugin#184

[emawby]

Closing issue as stale. If this is still happening in 2024 feel free to tag me to reopen