[GROOVY-10379] Error for super class and super interface methods of same name

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.0-beta-2
• Fix Version/s: 2.5.16, 3.0.10, 4.0.0-rc-1
• Labels: default-methods
• Assignee: Eric Milles
• Reporter: Eric Milles
• Created: 23/Nov/21 17:29
• Updated: 18/Feb/22 22:14
• Resolved: 23/Nov/21 18:33

Description

Follow up to GROOVY-9737. Another variation of static and non-static (interface default in this case) methods of the same name. Consider the following:

package p
abstract class A implements I {
  static void m(Number n) { print 'number' }
}

package p;
public interface I {
  default void m(String s) { System.out.print("string"); }
}

@groovy.transform.CompileStatic
class C extends p.A {
  void test() {
    m('') // error at run-time
  }
}
new C().test()

org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object 'class C' with class 'java.lang.Class' to class 'p.I'
	at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnSAM(DefaultTypeTransformation.java:420)
	at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnNumber(DefaultTypeTransformation.java:331)
	at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToType(DefaultTypeTransformation.java:251)
	at org.codehaus.groovy.vmplugin.v8.IndyInterface.fromCache(IndyInterface.java:318)
	at C.test(Main.groovy:4)
	at org.codehaus.groovy.vmplugin.v8.IndyInterface.fromCache(IndyInterface.java:318)
	at Main.run(Main.groovy:7)