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https://issues.apache.org/jira/browse/GROOVY-9340?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Eric Milles updated GROOVY-9340:
--------------------------------
Affects Version/s: 3.0.0-rc-2
> Lambda using variable expression parameter produces generics error for self
> type
> --------------------------------------------------------------------------------
>
> Key: GROOVY-9340
> URL: https://issues.apache.org/jira/browse/GROOVY-9340
> Project: Groovy
> Issue Type: Bug
> Affects Versions: 3.0.0-rc-2
> Reporter: Eric Milles
> Priority: Major
>
> Consider the following:
> {code:groovy}
> @groovy.transform.CompileStatic
> class C {
> void m() {
> java.util.function.Consumer<C> consumer = c -> null
> consumer.accept(this)
> }
> }
> {code}
> The lambda expression produces a compiler error:
> {code}
> A transform used a generics containing ClassNode C for the method public void
> doCall(C c) { ... } directly. You are not supposed to do this. Please create
> a new ClassNode referring to the old ClassNode and use the new ClassNode
> instead of the old one. Otherwise the compiler will create wrong descriptors
> and a potential NullPointerException in TypeResolver in the OpenJDK. If this
> is not your own doing, please report this bug to the writer of the transform.
> @ line 4, column 60.
> .function.Consumer<C> consumer = c -> null
> ^
> 1 error
> at
> org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:287)
> at
> org.codehaus.groovy.control.CompilationUnit.applyToPrimaryClassNodes(CompilationUnit.java:1091)
> at
> org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:633)
> at
> org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:612)
> at
> org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:589)
> at
> groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:367)
> at
> groovy.lang.GroovyClassLoader.lambda$parseClass$2(GroovyClassLoader.java:310)
> ...
> {code}
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