[GROOVY-6924] Runtime IncompatibleClassChangeError using with() on a JavaBean if @CompileStatic is used

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.3.3, 2.4.0-beta-1
• Fix Version/s: 2.3.4
• Component/s: Static compilation
• Assignee: Cédric Champeau
• Reporter: Mauro Molinari
• Created: 08/Jul/14 02:49
• Updated: 26/Jul/14 01:44
• Resolved: 16/Jul/14 05:42

Description

Consider the following Java class:

package i;

public class MyJavaBean {
	private String foo;
	private String bar;
	
	public String getFoo() {
		return foo;
	}
	
	public void setFoo(String foo) {
		this.foo = foo;
	}
	
	public String getBar() {
		return bar;
	}
	
	public void setBar(String bar) {
		this.bar = bar;
	}
}

and the following Groovy class:

package i

import groovy.transform.CompileStatic;

@CompileStatic
class I {
  void doSomething() {
	  MyJavaBean bean = new MyJavaBean()
	  bean.with {
		  foo = 'foo'
		  bar = 'bar'
	  }
	  println "$bean.foo and $bean.bar"
  }
  
  static void main(String[] args) {
	  new I().doSomething()
  }
}

If you run it as a Groovy script, you get:

Caught: java.lang.IncompatibleClassChangeError: Class i.MyJavaBean does not implement the requested interface groovy.lang.GroovyObject
java.lang.IncompatibleClassChangeError: Class i.MyJavaBean does not implement the requested interface groovy.lang.GroovyObject
	at i.I$_doSomething_closure1.doCall(I.groovy:10)
	at i.I$_doSomething_closure1.call(I.groovy)
	at i.I.doSomething(I.groovy:9)
	at i.I.main(I.groovy:17)

If you remove the @CompileStatic annotation from I class, all works fine.

On another project (the real one were I caught this), I get the same exception but with a different stack trace/error message:

java.lang.IncompatibleClassChangeError
	at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.setGroovyObjectProperty(ScriptBytecodeAdapter.java:528)
	at com.example.MyClass$_myMethod_closure4.doCall(MyClass.groovy:194)

The location is always an assignment within a with() closure. Again, I can workaround this by removing static compilation from that method.

Issue Links

• depends upon: GROOVY-6926 DGM#with should use @DelegatesTo and @ClosureParams