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Developer 6 min read Published Updated Credibility 40/100

Kotlin 1.4 Release Candidate

JetBrains published the Kotlin 1.4 release candidate on 30 July 2020, locking in new type inference, coroutine tooling stability, and multiplatform compiler improvements ahead of the long-term 1.4 support window.

Kodi C.

Editor & Research Lead

Fact-checked and reviewed — Kodi C.

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JetBrains announced the Kotlin 1.4 release candidate on 30 July 2020, marking feature freeze for the first major Kotlin release since 1.3.70. The RC cements new type inference, multiplatform compiler changes, and coroutine debugging improvements that teams will support through the 1.4 maintenance stream. Because the RC closely mirrors general availability, engineering managers can treat this build as the baseline for performance testing, dependency alignment, and migration of shared libraries that will underpin Android, JVM, JS, and Native targets for the next year.

What to do now

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  • Documentation update: Review and update relevant policies, procedures, and technical documentation.
  • Stakeholder communication: Brief affected teams on timeline implications and resource requirements.
  • Compliance verification: Schedule internal review to confirm alignment with guidance.

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Coverage intelligence

Published
Coverage pillar
Developer
Source credibility
40/100 — low confidence
Topics
Kotlin · JVM · Multiplatform · Coroutines · Language Tooling
Sources cited
3 sources (blog.jetbrains.com, kotlinlang.org, iso.org)
Reading time
6 min

Source material

  1. JetBrains — Kotlin 1.4 Release Candidate
  2. Kotlin 1.4 RC Release Notes
  3. ISO/IEC 27034-1:2011 — Application Security — International Organization for Standardization
  • Kotlin
  • JVM
  • Multiplatform
  • Coroutines
  • Language Tooling
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