vavr-io/vavr

Strange behaviour, maybe an error when using peek on Android 5.1.1

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#2,761 建立於 2024年4月3日

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help wanted

描述

The following code runs fine on newer Android versions. However, I've encountered an issue on Android 5.1.1.

After an HTTP request is returned, attempting to use peek to retrieve either the data or an error response results in unexpected behavior.

My request looks like this:

public Either<Failure, Authenticated> executeRequest(Params params) {
// return Failure or Authenticated
}

I expect the result to be received in my view model. Here's a simplified example of the expected behavior:

myUseCase.execute(signIn).peek(
   failure -> {},
   result -> {}
);

Neither the failure nor the success callback is triggered in the view model. However, I observed the following log message:

Rejecting re-init on previously-failed class java.lang.Class<io.vavr.control.Either$$ExternalSyntheticLambda0>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.control.Either$$ExternalSyntheticLambda0>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.control.Either$$ExternalSyntheticLambda1>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.control.Either$$ExternalSyntheticLambda1>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.control.Either$$ExternalSyntheticLambda2>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.control.Either$$ExternalSyntheticLambda2>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.Function1>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.Function1>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.PartialFunction>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.PartialFunction>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Seq>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Seq>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.IndexedSeq>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.IndexedSeq>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Vector>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Vector>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.IndexedSeq>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Array>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Array>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Array>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.IndexedSeq>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.CharSeq>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.CharSeq>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.CharSeq>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.PartialFunction>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Map>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Map>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Map>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Map>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Map>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Seq>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.LinearSeq>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.LinearSeq>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.List>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.List>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.List>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Map>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Map>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Map>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Map>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.LinearSeq>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Queue>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Queue>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Queue>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Map>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.SortedMap>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.SortedMap>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.SortedMap>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.SortedMap>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.SortedMap>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.SortedMap>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.SortedMap>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.SortedMap>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.SortedMap>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.LinearSeq>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Stream>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Stream>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Stream>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.List>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.List>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Vector>
Rejecting re-init on previously-failed class java.lang.Class<io.vavr.collection.Vector>
Rejecting re-init on previously-failed class java.lang.Class<com.mypackage.myapp.fragments.LoginFragmentViewModel$$ExternalSyntheticLambda1>

If I rewrite this using the following, it works:

Either<Failure, Authenticated> result = myUseCase.execute(signIn);

if(result.isLeft()) {
   Failure failure = result.getLeft();
} else {
   Authenticated authenticated = result.get();
}

貢獻者指南

技術棧
javaandroid
領域
mobile
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-2 days
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
fresh
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
mostly clear
前置要求
JavaAndroid developmentVavr library
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
30
研究方向
Investigate the 'Rejecting re init on previously failed class' errors reported on Android 5.1.1. These errors suggest that Vavr's lambda synthetic classes (e.g., Either$$ExternalSyntheticLambda0) are failing to load on the older ART runtime. Look into whether the issue is caused by desugaring of lambdas or ProGuard/R8 optimization. Check the Vavr source code, specifically the peek method in Either.java and related functional interfaces. Consider testing with different desugar configurations or adding explicit proguard rules. Also review existing comments in the issue for any additional clues.