[jira] [Created] (GROOVY-9340) Lambda using variable expression parameter produces generics error for self type

["Eric Milles (Jira)" <ji...@apache.org>]

Eric Milles created GROOVY-9340:
-----------------------------------

             Summary: 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
            Reporter: Eric Milles


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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