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https://issues.apache.org/jira/browse/MNG-6930?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17127698#comment-17127698
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Abel Salgado Romero commented on MNG-6930:
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Forgot to come back, I got confused with some other errors and just today saw
the problem was in `plexus-component-metadata`, v1.7 already fixed this.
If I want to keep my plugin Java8 compatible are the latest versions safe?
> Cannot use lambda as argument in a method in Mojo
> -------------------------------------------------
>
> Key: MNG-6930
> URL: https://issues.apache.org/jira/browse/MNG-6930
> Project: Maven
> Issue Type: Bug
> Components: Plugin API
> Affects Versions: 3.6.0
> Reporter: Abel Salgado Romero
> Priority: Major
>
> I have a plugin with uses a component that receives a lambda as argument.
> When passing any lamba, for example the following empty one
>
> {code:java}
>
> Optional<File> sourceDir = new SourceDirectoryLocator(sourceDirectory,
> project.getBasedir(), file -> {})
> .find();
> {code}
>
> `maven-plugin-plugin` fails with the error:
>
> {code:java}
>
> [ERROR] Failed to execute goal
> org.codehaus.plexus:plexus-component-metadata:1.5.5:generate-metadata
> (default) on project asciidoctor-maven-plugin: Error generating metadata: :
> Failed to extract descriptors: Index 9578 out of bounds for length 999 ->
> [Help 1]
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute
> goal org.codehaus.plexus:plexus-component-metadata:1.5.5:generate-metadata
> (default) on project asciidoctor-maven-plugin: Error generating metadata:
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:215)
>
> {code}
>
>
> Passing `null` or an anonymous class like shown below works however.
>
> {code:java}
>
> Optional<File> sourceDir = new SourceDirectoryLocator(sourceDirectory,
> project.getBasedir(),
> new Consumer<File>() {
> @Override
> public void accept(File file) {
> getLog().info("sourceDirectory " + file + " does not exist");
> }
> })
> .find();
>
> {code}
>
>
> Also tested with the current SNAPSHOT and the issue still happens
> Here is the code to reprodude:
> [https://github.com/abelsromero/asciidoctor-maven-plugin/tree/maven-plugin-plugin-lambda-issue]
> . Just run `mvn clean test-compile` to see the error.
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