Kotlin: support 2.4.20-RC - #22404
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Add standalone and embeddable extractor variants for Kotlin 2.4.20-RC. Use the modern compiler plugin registrar after removal of the legacy ComponentRegistrar API, while retaining the legacy path for older compilers. Preserve source locations for generated interface forwarders, and keep Kotlin 2.4.20 GA above the supported-version boundary. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Use Kotlin 2.4.20-RC by default in the development wrapper so Kotlin 2 tests exercise the newly supported prerelease. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Summary
Support Kotlin 2.4.20-RC in the Kotlin extractor. Kotlin 2.4.20 GA remains unsupported.
Kotlin 2.4.20-RC removes the legacy
ComponentRegistrarcompiler API and makes the remaining K1 compatibility APIs opt-in. This change adds standalone and embeddable RC extractor variants that useCompilerPluginRegistraronly, while retaining legacy registration for older compiler variants.Generated interface forwarders retain their enclosing class locations, preserving the previous database and query behaviour despite the compiler changing those IR nodes to synthetic locations. The too-new diagnostic fixture now uses
2.4.20GA directly to verify that the release compiler remains above the supported boundary.Parent PR: github/semmle-code#56185
Validation
v2.4.20-RCcompiler passed the Kotlin basic functionality extraction test2.4.20GANo tests are disabled. The fake-override expectations are unchanged.