chore(deps): bump kotlin.version from 2.4.20 to 2.4.21

[dependabot]

Bumps kotlin.version from 2.4.20 to 2.4.21.
Updates org.jetbrains.kotlin:kotlin-stdlib from 2.4.20 to 2.4.21

Release notes

Sourced from org.jetbrains.kotlin:kotlin-stdlib's releases.

Kotlin 2.4.21

Changelog

Backend. Wasm

• KT-89267 K/Wasm: calling a (T) -> R lambda with an argument that isn't a T traps instead of throwing ClassCastException

JVM. Reflection

• KT-89280 NoSuchElementException in argumentsMakeSenseOnlyForMutableContainer for Java non-static inner class of generic outer class
• KT-80710 Reflection: change KCallable representation to avoid dependency on K1

JavaScript

• KT-89449 Kotlin/JS: Member names no longer minified in production
• KT-89363 KJS. Regular class with companion can't extend external class

Tools. Compiler plugins. Serialization

• KT-89275 Kotlin/Wasm: Invalid Wasm is emitted for a @Serializable generic class with a class upper bound

Tools. Gradle. Native

• KT-89285 SwiftPM import results in flooded log
• KT-86251 K/N: Flaky linkDebugTestLinuxX64 failure with "truncated or malformed archive" on libstdlib-cache.a

Tools. Scripts

• KT-89247 Kotlin Script: NoClassDefFoundError on 2nd execution with transitive dependency from imported script
• KT-89220 JSR-223: generic Java bindings break all subsequent eval() calls
• KT-88458 Audit closeable resource usage
• KT-88453 VirtualFileScriptSource.text leaks an unclosed file stream — script source file handle held until GC, blocks file deletion on Windows

Kotlin 2.4.21-RC

Changelog

Backend. Wasm

• KT-89267 K/Wasm: calling a (T) -> R lambda with an argument that isn't a T traps instead of throwing ClassCastException

JVM. Reflection

• KT-89280 NoSuchElementException in argumentsMakeSenseOnlyForMutableContainer for Java non-static inner class of generic outer class
• KT-80710 Reflection: change KCallable representation to avoid dependency on K1

JavaScript

• KT-89449 Kotlin/JS: Member names no longer minified in production
• KT-89363 KJS. Regular class with companion can't extend external class

... (truncated)

Changelog

Sourced from org.jetbrains.kotlin:kotlin-stdlib's changelog.

2.4.21

Backend. Wasm

• KT-89267 K/Wasm: calling a (T) -> R lambda with an argument that isn't a T traps instead of throwing ClassCastException

JVM. Reflection

• KT-89280 NoSuchElementException in argumentsMakeSenseOnlyForMutableContainer for Java non-static inner class of generic outer class
• KT-80710 Reflection: change KCallable representation to avoid dependency on K1

JavaScript

• KT-89449 Kotlin/JS: Member names no longer minified in production
• KT-89363 KJS. Regular class with companion can't extend external class

Tools. Compiler plugins. Serialization

• KT-89275 Kotlin/Wasm: Invalid Wasm is emitted for a @Serializable generic class with a class upper bound

Tools. Gradle. Native

• KT-89285 SwiftPM import results in flooded log
• KT-86251 K/N: Flaky linkDebugTestLinuxX64 failure with "truncated or malformed archive" on libstdlib-cache.a

Tools. Scripts

• KT-89247 Kotlin Script: NoClassDefFoundError on 2nd execution with transitive dependency from imported script
• KT-89220 JSR-223: generic Java bindings break all subsequent eval() calls
• KT-88458 Audit closeable resource usage
• KT-88453 VirtualFileScriptSource.text leaks an unclosed file stream — script source file handle held until GC, blocks file deletion on Windows

Commits

• 9180ce6 Add changelog for 2.4.21-RC
• 851077b [Serialization] Copy type parameter bounds onto generated serializers (#8421)
• 1b6b624 [Wasm]: Generate a Kotlin-level cast for bridged lambda functions. (#8404)
• 3c223c2 Rrr/2.4.20/core docs (#8322)
• c681c2e [2.4.20] [KT-89285] Stop the xcodebuild logs being output by default (#8277)
• f0645d1 [2.4.20] [JS] Reorder CompilerConfiguration properties initialization (#8282)
• f507ecd [JS] Don't try to initialize an external class's companion object
• c60d7d8 Reflection: fix NoSuchElementException in ConvertFromJava.kt
• 05d1cde REPL: render correct reflected binding type
• 5acec47 Scripting: store collected dependencies recursively
• Additional commits viewable in compare view

Updates org.jetbrains.kotlin:kotlin-maven-plugin from 2.4.20 to 2.4.21

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

Summary by CodeRabbit

• Chores
  • Updated the Kotlin version used for testing.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: defaults
• Review profile: CHILL
• Plan: Enterprise
• Run ID: 964e9353-877f-4901-b244-a855e81e526a

---

📥 Commits

Reviewing files that changed from the base of the PR and between b300073 and dff4da1.

---

📒 Files selected for processing (1)

• operator-framework-core/pom.xml

---

Included review availability: This review used your included allowance. Your plan provides up to 12 included reviews per hour; 10 remain after this review.

---

---

📝 Walkthrough

Walkthrough

The test-only Kotlin version property in operator-framework-core/pom.xml changes from 2.4.20 to 2.4.21.

Changes

Kotlin test version update

Layer / File(s)	Summary
Update the Kotlin test version operator-framework-core/pom.xml	The test-only Kotlin version property changes from 2.4.20 to 2.4.21.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~3 minutes

Change: Other

Suggested reviewers: csviri

---

Merge Risk: ⚪ Minimal · up to dff4d

This updates only the core module’s Kotlin test toolchain and dependency; no production behavior change or concrete build regression is evident. The change is mergeable with normal build checks.

Pre-merge checks | 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the Kotlin version update from 2.4.20 to 2.4.21. It matches the main change in the pull request.
Docstring Coverage		No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

---

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Commit to this branch
• Create a new PR

---

• Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

---

_{Comment @coderabbitai help to get the list of available commands.}

[Copilot]

🟢 Approval recommended

The patch is a focused version update applied consistently to the core module’s Kotlin test dependencies.

0 open findings

What changed in this PR

Updates Kotlin test dependencies in the core framework from 2.4.20 to 2.4.21.

Changes:

• Bumps the shared Kotlin test dependency and Maven plugin version.

File	Description
operator-framework-core/​pom.xml	Updates kotlin.version to 2.4.21.

🧠 Review effort: Balanced

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.