[runningcode]

📜 Description

Bumps Kotlin to 2.4.21 and raises the Kotlin language and API version of the published modules from 1.9 to 2.0. Those modules now depend on kotlin-stdlib 2.0.21 instead of 1.9.24.

Kotlin applications that use the SDK need Kotlin 1.9 or newer, up from 1.8. A Kotlin compiler reads metadata one minor version ahead, so a 1.9 compiler can read our 2.0 classes. Java-only applications aren't affected.

Other changes the bump needed:

• Kotlin module names: KGP 2.4 prefixes the module name with the group, e.g. io.sentry:sentry-android-fragment_release. R8 writes that colon into the names of the .kotlin_module files it outputs, and app bundles reject it (Entry name contains invalid characters). JdkTargetConvention now pins the module name to the project name, so the module files keep the names 8.x shipped.
• SentryApiValidationPlugin: KGP 2.4 removed the experimental ABI validation API this plugin used (enabled, AbiValidationMultiplatformExtension). Validation is now enabled by calling abiValidation { }, which works the same for JVM, Android and multiplatform modules.
• ABI dumps:
  • sentry-android-fragment: FragmentLifecycleState gains getEntries(), because at language 2.0 the compiler generates entries for Kotlin enums. This is an addition.
  • sentry-android-sqlite, sentry-android-navigation3: the KGP 2.4 dumper no longer lists public synthetic constructors. The bytecode is unchanged; I compared it with 8.63.0.
• test-app-size: Compose's $stable fields now reference kotlin.jvm.JvmField. This app leaves out the Kotlin stdlib on purpose, so it gets one more -dontwarn.
• sentry-compose tests: at language 2.0 the compiler uses its new K2 frontend. With @Suppress("INVISIBLE_REFERENCE"), K2 compiles locals whose inferred type is an internal Compose class (LayoutNode, Owner) to error.NonExistentClass, and the tests failed with NoClassDefFoundError. Those locals are now typed explicitly.

K2 also warns that suppressing INVISIBLE_REFERENCE has unspecified behavior. Session Replay's masking code (SentryLayoutNodeHelper, Nodes, ComposeViewHierarchyNode) and three sentry-compose classes rely on it. Their compiled classes contain no error.NonExistentClass and their unit tests pass, but the UI tests are the real check for them.

SentryLog4j2AppenderAutoConfigurationTest in sentry-spring-boot-jakarta is flaky, and also fails on 9.x.x without this change.

💡 Motivation and Context

Kotlin 2.4 rejects language and API version 1.9, so keeping the 1.9 floor meant staying on Kotlin 2.3. 2.0 is the oldest version Kotlin 2.4 accepts. It's deprecated there, so the build prints a warning. This ships in SDK 9 together with its other new minimum requirements.

📝 Checklist

• I added GH Issue ID & Linear ID
• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• I updated the wizard if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.
• Public API changes reviewed by another Mobile SDK team member or implemented according to the develop docs spec.

🔮 Next steps

• Announce the Kotlin 1.9 requirement next to the Java 11 and minSdk 26 requirements (docs: Announce Java 11 and minSdk 26 requirements for SDK 9 #6471).

🤖 Generated with Claude Code

[sentry]

📲 Install Builds

Android

🔗 App Name	App ID	Version	Configuration
SDK Size	io.sentry.tests.size	8.63.0 (1)	release

⚙️ sentry-android Build Distribution Settings