[GROOVY-6672] ClassFormatError if trait (accidentally) "extends" interface

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.0-beta-1
• Fix Version/s: 2.3.0-beta-2
• Component/s: Compiler
• Labels: ClassFormatError
• Assignee: Cédric Champeau
• Reporter: Peter Niederwieser
• Created: 05/Apr/14 01:42
• Updated: 22/May/22 16:06
• Resolved: 07/Apr/14 04:11

Description

interface Foo {}
trait Bar extends Foo {} // oops: should be "implements"

No compile error occurs. Runtime error: "java.lang.ClassFormatError: Interfaces must have java.lang.Object as superclass in class file Bar"