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Compiler Exception when defining a serializer for a data class in another gradle project

See original GitHub issue

I am trying to define an external serializer for a data class (Data) which is defined in another gradle module (subproject) and the result is the following exception.

Caused by: java.lang.IllegalStateException: Class Data have constructor parameters which are not properties and therefore it is not serializable automatically
        at org.jetbrains.kotlinx.serialization.compiler.backend.common.SerializerCodegen.checkSerializability(SerializerCodegen.kt:38)
        at org.jetbrains.kotlinx.serialization.compiler.backend.common.SerializerCodegen.generateSerializableClassPropertyIfNeeded(SerializerCodegen.kt:106)
        at org.jetbrains.kotlinx.serialization.compiler.backend.common.SerializerCodegen.generate(SerializerCodegen.kt:44)
        at org.jetbrains.kotlinx.serialization.compiler.backend.jvm.SerializerCodegenImpl$Companion.generateSerializerExtensions(SerializerCodegenImpl.kt:49)
        at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationCodegenExtension.generateClassSyntheticParts(SerializationCodegenExtension.kt:30)
        at org.jetbrains.kotlin.codegen.ImplementationBodyCodegen.generateSyntheticPartsAfterBody(ImplementationBodyCodegen.java:438)
        at org.jetbrains.kotlin.codegen.MemberCodegen.generate(MemberCodegen.java:132)
        at org.jetbrains.kotlin.codegen.MemberCodegen.genClassOrObject(MemberCodegen.java:302)
        at org.jetbrains.kotlin.codegen.MemberCodegen.genClassOrObject(MemberCodegen.java:286)
        at org.jetbrains.kotlin.codegen.PackageCodegenImpl.generateClassesAndObjectsInFile(PackageCodegenImpl.java:118)
        at org.jetbrains.kotlin.codegen.PackageCodegenImpl.generateFile(PackageCodegenImpl.java:137)
        at org.jetbrains.kotlin.codegen.PackageCodegenImpl.generate(PackageCodegenImpl.java:68)
        ... 44 more

It works if the data class is defined in the same gradle module as the serializer.

To Reproduce Check out https://github.com/mdietrichstein/bug_repro_kotlinx.serialization_gradle_multiproject_ext_serializer and run ./gradlew clean test

Expected behavior The compiler executes successfully

Environment

Kotlin version: 1.3.31 and 1.3.41
Library version: 0.11.0 and 0.11.1
Kotlin platforms: Android
Gradle version: 5.4.1
Other relevant context: Ubuntu 18.04 and MacOSX

Issue Analytics

State:
Created 4 years ago
Reactions:12
Comments:9 (1 by maintainers)

Top GitHub Comments

1reaction

igrcommented, Apr 21, 2022

Still Kotlin 1.6.20 and serialization 1.3.2.

(do you see the pattern here?😃

1reaction

mqueiroz1995commented, Feb 26, 2021

Still happens with kotlin 1.4.30 and serialization 1.1.0.

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