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Method-reference style implementations of an interface are not found by "Find All Implementations" #4140

@miskr-instructure

Description

@miskr-instructure

As the title says, "Find All References" does not enumerate method reference style lambdas as implementations.

Minimal repro (see attached image for "0 implementations" code lens).

package com.example;

public class Repro {

  public interface MyInterface {
    boolean call(int arg1);
  }

  private boolean call(int arg1) {
    return arg1 > 0;
  }

  public boolean run() {
    MyInterface myInterface = this::call;
    return myInterface.call(5);
  }
}
Image

VSC:

Version: 1.102.3 (Universal)
Commit: 488a1f239235055e34e673291fb8d8c810886f81
Date: 2025-07-29T03:00:23.339Z
Electron: 35.6.0
ElectronBuildId: 11847422
Chromium: 134.0.6998.205
Node.js: 22.15.1
V8: 13.4.114.21-electron.0
OS: Darwin arm64 24.6.0

Redhat extension:

Identifier
redhat.java

Version
1.44.0

Last Updated
2025-07-31, 17:57:17

JVM:

21.0.8 (arm64) "Amazon.com Inc." - "Amazon Corretto 21" /Library/Java/JavaVirtualMachines/amazon-corretto-21.jdk/Contents/Home

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