[Snyk] Upgrade org.jetbrains.kotlin:kotlin-stdlib from 1.6.20 to 2.4.0

[mhill-os]

Snyk has created this PR to upgrade org.jetbrains.kotlin:kotlin-stdlib from 1.6.20 to 2.4.0.

ℹ️ Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

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• The recommended version is 113 versions ahead of your current version.

• The recommended version was released 24 days ago.

Issues fixed by the recommended upgrade:

	Issue	Score	Exploit Maturity
	Information Exposure SNYK-JAVA-ORGJETBRAINSKOTLIN-2393744	65	Proof of Concept

Breaking Change Risk

Notice: This assessment is enhanced by AI.

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Important

• Warning: This PR contains a major version upgrade, and may be a breaking change.
• Check the changes in this PR to ensure they won't cause issues with your project.
• This PR was automatically created by Snyk using the credentials of a real user.
• Max score is 1000. Note that the real score may have changed since the PR was raised.

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[mhill-os]

This major version upgrade from Kotlin 1.6.20 to 2.4.0 is a high-risk change, primarily due to the mandatory switch to the new K2 compiler, which is now the only compiler available in Kotlin 2.0 and later.

Key Breaking Changes:

• K2 Compiler is Mandatory: The K2 compiler is a complete rewrite of the Kotlin frontend. While it brings significant performance improvements (up to 2x faster builds) and more precise type checking, it is also stricter. Code that relied on bugs or lenient behavior in the old compiler may no longer compile or may behave differently.
• Source and Behavioral Incompatibilities: The official Kotlin 2.0 compatibility guide lists several source-incompatible changes that can cause build failures without code modification. These include stricter validation, changes to overload resolution, and fixes to long-standing bugs that code may have inadvertently relied on.
• Annotation Processing (KAPT to KSP): While not a direct compiler change, migrating to Kotlin 2.0 is a strong impetus to move from the Kotlin Annotation Processing Tool (KAPT) to Kotlin Symbol Processing (KSP), as KAPT is not enabled by default and is considered legacy. This can be a significant migration effort for projects that use annotation processors.
• Kotlin/Native Target Changes: For multiplatform projects, Kotlin 2.4 raises the minimum supported Apple target versions to iOS 15.0, macOS 12.0, and watchOS 8.0.

Recommendation:
This upgrade requires careful planning and testing. Developers must:

1. Thoroughly test the entire application after the upgrade, as the K2 compiler's stricter analysis can expose previously hidden issues.
2. Review the official "Compatibility guide for Kotlin 2.0" for a detailed list of source-incompatible changes.
3. Plan for the migration from KAPT to KSP for any annotation processors used in the project.

Notice 🤖: This content was augmented using artificial intelligence. AI-generated content may contain errors and should be reviewed for accuracy before use.

[mhill-os]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scan Engine	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues
✅	Licenses	0	0	0	0	0 issues

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