[GROOVY-8127] Access to Trait$Trait$Helper#$self is forbidden - ASF JIRA

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Details

Type: Bug
Status: Closed
Priority: Major
Resolution: Fixed
Affects Version/s: 2.4.10
Fix Version/s: 2.4.11
Component/s: Compiler
Labels:
- traits

Description

I'm switching from Groovy 2.4.7 to 2.4.10 in my project.

I have a compile error with 2.4.10.
Simplified example:

import groovy.transform.CompileStatic
import org.junit.Rule
import org.junit.rules.TestRule
@CompileStatic
trait FooTrait {
    @Rule
    public final TestRule foo = {} as TestRule
}

I get "Error:Groovyc: Access to FooTrait$Trait$Helper#$self is forbidden"

Another variant of this error is "Error:Groovyc: Apparent variable '$self'
was found in a static scope but doesn't refer to a local variable, static
field or class."

This second error happens with the following code

import groovy.transform.CompileStatic
import org.junit.Rule
import org.junit.rules.TestRule
import org.junit.runner.Description
import org.junit.runners.model.Statement

@CompileStatic
trait TestSupport {

    boolean failOnResourceLeak = true

    @Rule
    public final TestRule leakDetectionFlagRule = { Statement base, Description description ->
        return {
            base.evaluate()
            if (failOnResourceLeak) {
                throw new Exception("A resource has leaked in this test!")
            }
        } as Statement
    } as TestRule

}