GROOVY-10791

Author: eric-milles

base-test/org.eclipse.jdt.groovy.core.tests.compiler/src/org/eclipse/jdt/groovy/core/tests/xform/StaticCompilationTests.java

@@ -7885,4 +7885,26 @@ public void testCompileStatic10742() {
             "Groovy:Invalid return type: void is not convertible to java.lang.String\n" +
             "----------\n");
     }
+
+    @Test
+    public void testCompileStatic10791() {
+        assumeTrue(isParrotParser());
+
+        //@formatter:off
+        String[] sources = {
+            "Main.groovy",
+            "import java.util.function.*\n" +
+            "@SuppressWarnings('rawtypes')\n" +
+            "@groovy.transform.CompileStatic\n" +
+            "void test(List list) {\n" +
+            "  BiConsumer<List,Consumer> bc = List::forEach\n" + // default method of Iterator
+            "  Consumer printer = { print(it) }\n" +
+            "  bc.accept(list, printer)\n" +
+            "}\n" +
+            "test(['works'])\n",
+        };
+        //@formatter:on
+
+        runConformTest(sources, "works");
+    }
 }

base/org.codehaus.groovy30/src/org/codehaus/groovy/classgen/asm/sc/StaticTypesMethodReferenceExpressionWriter.java

@@ -52,6 +52,7 @@
 import static org.codehaus.groovy.ast.tools.GeneralUtils.callX;
 import static org.codehaus.groovy.ast.tools.GeneralUtils.classX;
 import static org.codehaus.groovy.ast.tools.GeneralUtils.ctorX;
+import static org.codehaus.groovy.ast.tools.GeneralUtils.getInterfacesAndSuperInterfaces;
 import static org.codehaus.groovy.ast.tools.GeneralUtils.nullX;
 import static org.codehaus.groovy.ast.tools.GeneralUtils.returnS;
 import static org.codehaus.groovy.ast.tools.GenericsUtils.extractPlaceholders;
@@ -281,9 +282,14 @@ private MethodNode findMethodRefMethod(final String methodName, final Parameter[
 
     private List<MethodNode> findVisibleMethods(final String name, final ClassNode type) {
         List<MethodNode> methods = type.getMethods(name);
+        // GROOVY-10791: include interface default methods in search
+        for (ClassNode cn : getInterfacesAndSuperInterfaces(type)) {
+            for (MethodNode mn : cn.getDeclaredMethods(name)) {
+                if (mn.isDefault()) methods.add(mn);
+            }
+        }
         methods.addAll(findDGMMethodsForClassNode(controller.getSourceUnit().getClassLoader(), type, name));
-        methods = filterMethodsByVisibility(methods, controller.getClassNode());
-        return methods;
+        return filterMethodsByVisibility(methods, controller.getClassNode());
     }
 
     private void addFatalError(final String msg, final ASTNode node) {

base/org.codehaus.groovy40/src/org/codehaus/groovy/classgen/asm/sc/StaticTypesMethodReferenceExpressionWriter.java

@@ -49,6 +49,7 @@
 import static org.codehaus.groovy.ast.tools.GeneralUtils.callX;
 import static org.codehaus.groovy.ast.tools.GeneralUtils.classX;
 import static org.codehaus.groovy.ast.tools.GeneralUtils.ctorX;
+import static org.codehaus.groovy.ast.tools.GeneralUtils.getInterfacesAndSuperInterfaces;
 import static org.codehaus.groovy.ast.tools.GeneralUtils.nullX;
 import static org.codehaus.groovy.ast.tools.GeneralUtils.returnS;
 import static org.codehaus.groovy.ast.tools.GeneralUtils.varX;
@@ -354,9 +355,14 @@ else if (samParameters.length >= nParameters) { // 1+ case
 
     private List<MethodNode> findVisibleMethods(final String name, final ClassNode type) {
         List<MethodNode> methods = type.getMethods(name);
+        // GROOVY-10791: include interface default methods in search
+        for (ClassNode cn : getInterfacesAndSuperInterfaces(type)) {
+            for (MethodNode mn : cn.getDeclaredMethods(name)) {
+                if (mn.isDefault()) methods.add(mn);
+            }
+        }
         methods.addAll(findDGMMethodsForClassNode(controller.getSourceUnit().getClassLoader(), type, name));
-        methods = filterMethodsByVisibility(methods, controller.getClassNode());
-        return methods;
+        return filterMethodsByVisibility(methods, controller.getClassNode());
     }
 
     private void addFatalError(final String msg, final ASTNode node) {