Kotlin: support 2.4.20-RC2 - #22404
Open
andersfugmann wants to merge 8 commits into
Open
Conversation
Copy link
Copy Markdown
Contributor
Sorry, something went wrong.
andersfugmann
force-pushed
the
andersfugmann/kotlin-2.4.20rc
branch
7 times, most recently
from
f74d5b1 to
2fa6f32
Compare
August 26, 2026 10:43
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Kotlin 2.4.20-RC removes the remaining ComponentRegistrar API under KT-85816. Use an RC-specific registrar that only implements CompilerPluginRegistrar, and package the legacy ComponentRegistrar service only for older compilers. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Kotlin 2.4.20-RC marks public K1 APIs with K1Deprecation under KT-86046 and rejects the previous repeatable-annotation IR access path. Opt in to K1Deprecation for 2.4.20 and later, and use the existing annotationClass compatibility extension. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Kotlin 2.4.20-RC assigns synthetic source offsets to generated interface forwarders. Use the enclosing class location for each fabricated forwarder and its generated body and accesses, preserving existing database and query output. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
andersfugmann
force-pushed
the
andersfugmann/kotlin-2.4.20rc
branch
from
2fa6f32 to
b9c81d5
Compare
August 26, 2026 11:25
Replace the previous 2.4.20-RC dependency set and compatibility marker with RC2 while preserving existing extraction output. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Copy link
Copy Markdown
Contributor
Author
|
Bumped artifacts to Kotlin 2.4.20-RC2 |
Sorry, something went wrong.
Copy link
Copy Markdown
Contributor
There was a problem hiding this comment.
Copilot review overview
Review tier: Balanced
Findings: None
Adds preliminary Kotlin 2.4.20-RC2 extractor support while continuing to reject Kotlin 2.4.20 GA.
Changes:
- Adds RC2 compiler dependencies and extractor variants.
- Adapts compiler registration, annotations, and synthetic forwarder locations.
- Updates defaults, diagnostics, documentation, and release notes.
| File | Description |
|---|---|
| MODULE.bazel | Registers RC2 dependency repositories. |
| java/ql/lib/change-notes/2026-08-21-kotlin-2.4.20.md | Announces preliminary support. |
| java/ql/integration-tests/kotlin/all-platforms/diagnostics/kotlin-version-too-new/fake-kotlinc-source/kotlin/KotlinVersion.java | Tests the GA rejection boundary. |
| java/ql/integration-tests/kotlin/all-platforms/diagnostics/kotlin-version-too-new/diagnostics.expected | Updates the expected diagnostic. |
| java/kotlin-extractor/versions.bzl | Adds the RC2 extractor version. |
| java/kotlin-extractor/src/main/kotlin/utils/versions/v_2_4_20-RC2/Kotlin2ComponentRegistrar.kt | Implements the supported registrar API. |
| java/kotlin-extractor/src/main/kotlin/MetaAnnotationSupport.kt | Uses compatible annotation-class access. |
| java/kotlin-extractor/src/main/kotlin/KotlinFileExtractor.kt | Stabilizes generated forwarder locations. |
| java/kotlin-extractor/dev/wrapper.py | Makes RC2 the development default. |
| java/kotlin-extractor/deps/kotlin-stdlib-2.4.20-RC2.jar | Adds the RC2 standard library artifact. |
| java/kotlin-extractor/deps/kotlin-compiler-embeddable-2.4.20-RC2.jar | Adds the embeddable compiler artifact. |
| java/kotlin-extractor/deps/kotlin-compiler-2.4.20-RC2.jar | Adds the standalone compiler artifact. |
| java/kotlin-extractor/BUILD.bazel | Configures version-specific APIs and services. |
| docs/codeql/reusables/supported-versions-compilers.rst | Documents preliminary RC2 support. |
💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.
Sorry, something went wrong.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
Support Kotlin 2.4.20-RC2 in the Kotlin extractor. Kotlin 2.4.20 GA remains unsupported.
The implementation is split between release-driven compatibility changes and two observed RC2 behaviours. The release changelog explicitly removes remaining ComponentRegistrar usage (KT-85816) and applies @K1Deprecation to public K1 APIs (KT-86046). The RC2 compiler also gives generated interface forwarders synthetic source offsets and rejects the previous repeatable-annotation access path. The extractor adapts to those behaviours without changing query results.
Motivation for each change
Compatibility
Validation
No tests are disabled. The only changed generated expectation is the too-new diagnostic.