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Summary

  • Fixes issue where ReplaceLambdaWithMethodReference would incorrectly transform lambdas in nested generic/overloaded method contexts, breaking type inference
  • Adds isLambdaInGenericAndOverloadedContext() check to detect when lambda-to-method-reference conversion would break compilation
  • Adds test case for the problematic pattern: foo(fold(() -> Optional.empty())) where fold is generic and foo is overloaded
  • Adds test case to verify simple generic method calls still get transformed correctly

Test plan

🤖 Generated with Claude Code

… contexts (#774)

Adds a check to prevent converting lambdas to method references when the lambda is passed through method calls where one of the enclosing methods is overloaded and type inference depends on the lambda's explicit return type.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>
@timtebeek timtebeek linked an issue Nov 10, 2025 that may be closed by this pull request
@timtebeek timtebeek added bug Something isn't working recipe labels Nov 10, 2025
@timtebeek timtebeek changed the title Prevent ReplaceLambdaWithMethodReference in nested generic/overloaded contexts Prevent ReplaceLambdaWithMethodReference in nested generic/overloaded contexts Nov 10, 2025
@timtebeek timtebeek merged commit 0ea5975 into main Nov 10, 2025
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@timtebeek timtebeek deleted the fix-lambda-method-ref-generic-overload branch November 10, 2025 14:37
@github-project-automation github-project-automation bot moved this from In Progress to Done in OpenRewrite Nov 10, 2025
mergify bot added a commit to robfrank/linklift that referenced this pull request Nov 24, 2025
… 2.21.0 to 2.22.0 [skip ci]

Bumps [org.openrewrite.recipe:rewrite-static-analysis](https://github.com/openrewrite/rewrite-static-analysis) from 2.21.0 to 2.22.0.
Release notes

*Sourced from [org.openrewrite.recipe:rewrite-static-analysis's releases](https://github.com/openrewrite/rewrite-static-analysis/releases).*

> 2.22.0
> ------
>
> What's Changed
> --------------
>
> * Prevent `AnnotateNullableMethods` from failing on TypeScript sources by [`@​greg-at-moderne`](https://github.com/greg-at-moderne) in [openrewrite/rewrite-static-analysis#773](https://redirect.github.com/openrewrite/rewrite-static-analysis/pull/773)
> * Fix CombineSemanticallyEqualCatchBlocks for inner exception types by [`@​timtebeek`](https://github.com/timtebeek) in [openrewrite/rewrite-static-analysis#772](https://redirect.github.com/openrewrite/rewrite-static-analysis/pull/772)
> * Handle single quotes in ReplaceStringBuilderWithString by [`@​timtebeek`](https://github.com/timtebeek) in [openrewrite/rewrite-static-analysis#775](https://redirect.github.com/openrewrite/rewrite-static-analysis/pull/775)
> * Prevent `ReplaceLambdaWithMethodReference` in nested generic/overloaded contexts by [`@​timtebeek`](https://github.com/timtebeek) in [openrewrite/rewrite-static-analysis#776](https://redirect.github.com/openrewrite/rewrite-static-analysis/pull/776)
> * Fix ReplaceLambdaWithMethodReference for local records and classes by [`@​timtebeek`](https://github.com/timtebeek) in [openrewrite/rewrite-static-analysis#777](https://redirect.github.com/openrewrite/rewrite-static-analysis/pull/777)
> * Move nullable annotations to array types by [`@​timtebeek`](https://github.com/timtebeek) in [openrewrite/rewrite-static-analysis#778](https://redirect.github.com/openrewrite/rewrite-static-analysis/pull/778)
> * Annotate nullable array type parameters by [`@​timtebeek`](https://github.com/timtebeek) in [openrewrite/rewrite-static-analysis#779](https://redirect.github.com/openrewrite/rewrite-static-analysis/pull/779)
> * Annotate required parameters with `@NonNull` and remove throws by [`@​timtebeek`](https://github.com/timtebeek) in [openrewrite/rewrite-static-analysis#782](https://redirect.github.com/openrewrite/rewrite-static-analysis/pull/782)
> * Skip UnnecessaryCatch after any missing types via a precondition by [`@​timtebeek`](https://github.com/timtebeek) in [openrewrite/rewrite-static-analysis#784](https://redirect.github.com/openrewrite/rewrite-static-analysis/pull/784)
> * Run `UnnecessaryCatch` after `UnnecessaryThrows` to remove unused catch clauses by [`@​timtebeek`](https://github.com/timtebeek) in [openrewrite/rewrite-static-analysis#785](https://redirect.github.com/openrewrite/rewrite-static-analysis/pull/785)
> * Add JavascriptFileChecker to selectively skip JavaScript files by [`@​timtebeek`](https://github.com/timtebeek) in [openrewrite/rewrite-static-analysis#787](https://redirect.github.com/openrewrite/rewrite-static-analysis/pull/787)
> * Fix `RemoveUnusedLocalVariables` to preserve assignments with side effects by [`@​timtebeek`](https://github.com/timtebeek) in [openrewrite/rewrite-static-analysis#741](https://redirect.github.com/openrewrite/rewrite-static-analysis/pull/741)
>
> **Full Changelog**: <openrewrite/rewrite-static-analysis@v2.21.0...v2.22.0>


Commits

* [`4d6fd83`](openrewrite/rewrite-static-analysis@4d6fd83) Fix `RemoveUnusedLocalVariables` to preserve assignments with side effects (#...
* [`16dc1da`](openrewrite/rewrite-static-analysis@16dc1da) Add JavascriptFileChecker to selectively skip JavaScript files ([#787](https://redirect.github.com/openrewrite/rewrite-static-analysis/issues/787))
* [`c1712c2`](openrewrite/rewrite-static-analysis@c1712c2) Update documentation examples
* [`af53ce1`](openrewrite/rewrite-static-analysis@af53ce1) Run `UnnecessaryCatch` after `UnnecessaryThrows` to remove unused catch claus...
* [`b670b5a`](openrewrite/rewrite-static-analysis@b670b5a) Skip UnnecessaryCatch after any missing types via a precondition ([#784](https://redirect.github.com/openrewrite/rewrite-static-analysis/issues/784))
* [`0f1d5db`](openrewrite/rewrite-static-analysis@0f1d5db) Annotate required parameters with `@NonNull` and remove throws ([#782](https://redirect.github.com/openrewrite/rewrite-static-analysis/issues/782))
* [`02e09d0`](openrewrite/rewrite-static-analysis@02e09d0) Annotate nullable array type parameters ([#779](https://redirect.github.com/openrewrite/rewrite-static-analysis/issues/779))
* [`0f25051`](openrewrite/rewrite-static-analysis@0f25051) Move nullable annotations to array types ([#778](https://redirect.github.com/openrewrite/rewrite-static-analysis/issues/778))
* [`995c2d3`](openrewrite/rewrite-static-analysis@995c2d3) Fix `ReplaceLambdaWithMethodReference` for local records and classes ([#336](https://redirect.github.com/openrewrite/rewrite-static-analysis/issues/336)) (...
* [`0ea5975`](openrewrite/rewrite-static-analysis@0ea5975) Prevent `ReplaceLambdaWithMethodReference` in nested generic/overloaded conte...
* Additional commits viewable in [compare view](openrewrite/rewrite-static-analysis@v2.21.0...v2.22.0)
  
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ReplaceLambdaWithMethodReference with polymorphic and generics

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