[GROOVY-9173] IllegalAccessError for class extending Java class that provides protected getProperty/setProperty

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.5.7
• Fix Version/s: 3.0.0-rc-2
• Assignee: Eric Milles
• Reporter: Eric Milles
• Created: 12/Jun/19 17:30
• Updated: 09/Dec/19 21:36
• Resolved: 30/Oct/19 14:42

Description

Consider the following:
PropertyBased.java

public class PropertyBased {
  protected final Object getProperty(String name) {
    return null;
  }
  protected final void setProperty(String name, Object value) {
  }
}

Whatever.groovy

@groovy.transform.CompileStatic
class Whatever extends PropertyBased {
  def getSomething() {
    'some thing'
  }
}

No compiler errors are produced for Whatever having protected "implementations" of GroovyObject methods. In this case, our legacy Java base class has getProperty for non-Groovy reasons. However, when accessing Whatever from dynamic Groovy code, IllegalAccessError is thrown. See the attached (run gradlew test)