Fix #404: Crash when using abstract class extending abstract class via interface.

Author: dim-s

jphp-core/tests/org/develnext/jphp/core/compiler/jvm/ClassesTest.java

@@ -146,9 +146,18 @@ public void testBugs() {
         check("classes/bug123.php");
         check("classes/bug127.php");
         check("classes/bug130.php");
+    }
+
+    @Test
+    public void testBug391() {
         check("classes/bug391.phpt", true);
     }
 
+    @Test
+    public void testBug404() {
+        check("classes/bug404.phpt", true);
+    }
+
     @Test
     public void testBug264() {
         check("classes/bug264.php");

jphp-core/tests/resources/classes/bug404.phpt

@@ -0,0 +1,26 @@
+--TEST--
+Crash when using abstract class extending abstract class via interface
+--FILE--
+<?php
+interface a
+{
+    public function test();
+}
+
+abstract class b implements a
+{
+}
+
+abstract class c extends b
+{
+}
+
+class d extends c
+{
+    public function test() { var_dump("ok"); }
+}
+
+(new d)->test();
+?>
+--EXPECT--
+string(2) "ok"

jphp-runtime/src/php/runtime/reflection/ClassEntity.java

@@ -318,7 +318,7 @@ public SignatureResult addMethod(MethodEntity method, String realName) {
         SignatureResult addResult = new SignatureResult();
         if (method.isAbstract && method.isFinal) {
             addResult.add(InvalidMethod.error(InvalidMethod.Kind.FINAL_ABSTRACT, method));
-        } else if (method.isAbstractable() && !(method.isAbstract || type == Type.INTERFACE)) {
+        } else if (method.isAbstractable() && !(method.isAbstract || type == Type.INTERFACE || isAbstract)) {
             addResult.add(InvalidMethod.error(InvalidMethod.Kind.NON_ABSTRACT, method));
         } else if (method.isAbstract && !method.isAbstractable()) {
             addResult.add(InvalidMethod.error(InvalidMethod.Kind.NON_ABSTRACTABLE, method));