[jira] [Created] (GROOVY-9501) MissingPropertyException for access to private static field from inner class when subclassing

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

Eric Milles created GROOVY-9501:
-----------------------------------

             Summary: MissingPropertyException for access to private static field from inner class when subclassing
                 Key: GROOVY-9501
                 URL: https://issues.apache.org/jira/browse/GROOVY-9501
             Project: Groovy
          Issue Type: Documentation
    Affects Versions: 2.5.10
            Reporter: Eric Milles


Consider the following:
{code:groovy}
class Main extends Outer {
  static main(args) {
    newInstance().newThread()
  }
}

abstract class Outer {
  private static volatile boolean flag

  protected void newThread() {
    Thread thread = new Inner()
    thread.start()
    thread.join()
  }

  private final class Inner extends Thread {
    void run() {
     try {
      if (!flag) {
        sleep(1000)
      }
     } catch (Throwable t) {
      t.printStackTrace()
     }
    }
  }
}
{code}

In this example, {{Main}} extends {{Outer}} and is the type that is instantiated and used.  {{Inner}} makes reference to private static field {{flag}} of {{Outer}}.  When {{Inner}} is non-static as in this example, it gets the following error when reading "flag":
{code}
groovy.lang.MissingPropertyException: No such property: flag for class: Main
Possible solutions: class
	at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:65)
	at org.codehaus.groovy.runtime.callsite.GetEffectivePogoPropertySite.getProperty(GetEffectivePogoPropertySite.java:87)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGroovyObjectGetProperty(AbstractCallSite.java:309)
	at Outer$Inner.run(Script1.groovy:20)
{code}

*Note*: changing {{Inner}} from final to static fixes this specific case.  However, non-static inners that need to be that way are going to have this problem.

This is possibly related to: GROOVY-8999




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