[GROOVY-7879] Groovy calls wrong method if there is a static method on an interface

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.7
• Fix Version/s: 2.4.11
• Component/s: Compiler
• Assignee: Paul King
• Reporter: Stefan Wolf
• Created: 05/Jul/16 11:35
• Updated: 02/May/17 02:03
• Resolved: 21/Apr/17 11:04

Description

If there is an interface having the static method foo and a class Impl implementing this interface also having a static method foo, then calling Impl.foo() calls the method on the interface. For an easy self contained example have a look at https://github.com/wolfs/groovy-static-interface-method-test/blob/master/src/test/groovy/StaticInterfaceTest.groovy.

This can yield class cast exceptions on Java 8 and from Java 9 build 125 onwards this yields

java.lang.IncompatibleClassChangeError: Method ... must be InterfaceMethodref constant

This verification has been introduced here: https://bugs.openjdk.java.net/browse/JDK-8145148.

Issue Links

• links to: GitHub Pull Request #521