Kotlin 2.4.20

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Kotlin·Sep 7, 2026, 10:31 AMDeprecationMay break your integrationAI-assisted summary

Summary

Added extensive Analysis API enhancements, including support for companion block members, extensions, KMP interop, new Ka* symbols, type building API, and improved publishing structure.
Improved Light Classes and Java/Kotlin interop with companion resolution, record component support, correct handling of collection interfaces, and numerous false‑positive and symbol validity fixes.
Enhanced Kotlin/Wasm and JKLIB backends: default range checks, wasm memory API, header compilation mode, J2KLIB target support, and native debugging trace fixes.

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Official source Last checked Aug 4, 2026, 6:01 AM

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AI-assisted summarysource needs reviewLast checked Aug 4, 2026, 6:01 AM

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