Error reported on subclass of a class implementing trait

[mauromol]

Consider the following:

package test30

import groovy.transform.CompileStatic

@CompileStatic
trait T {
	String getFoo() { 'foo' }
}

package test30

import groovy.transform.CompileStatic

@CompileStatic
class A implements T {
}

package test30

import groovy.transform.CompileStatic

@CompileStatic
class B extends A {
}

And:

package test30

import groovy.transform.CompileStatic

@CompileStatic
class Test30 {

	static void main(args) {
		println new B().foo
	}

}

Greclipse is reporting an error on B:

Groovy:Can't have an abstract method in a non-abstract class. The class 'test30.B' must be declared abstract or the method 'java.lang.String getFoo()' must be implemented.

I don't expect this error. Also, the Groovy compiler seems to compile this code and if I run Test30 I get the expected result.

[eric-milles]

This method in JDTClassNode is mixing in the abstract modifier for interfaces (aka traits). Looks like it needs a check for traits.

    private MethodNode methodBindingToMethodNode(MethodBinding methodBinding) {
        try {
            int modifiers = methodBinding.modifiers;
            if (jdtBinding.isInterface() && !Flags.isStatic(modifiers) && !Flags.isSynthetic(modifiers) && !Flags.isDefaultMethod(modifiers)) {
                modifiers |= Flags.AccAbstract;
            }

[eric-milles]

Ready to test

[mauromol]

Tested with 3.1.0.xx-201808132239-e48, works both on this test case and on my real project, thank you! 👍