Fix #407: Cannot bind closure.

Author: dim-s

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

@@ -55,4 +55,9 @@ public void testBug266() {
     public void testBug370() {
         check("closures/bug370.phpt");
     }
+
+    @Test
+    public void testBug407() {
+        check("closures/bug407.phpt");
+    }
 }

jphp-core/tests/resources/closures/bug407.phpt

@@ -0,0 +1,20 @@
+--TEST--
+Cannot bind closure
+--FILE--
+<?php
+function &getVar($obj, string $var)
+{
+    return \Closure::bind(
+        function & () use ($var) {
+            return $this->{$var};
+        },
+        $obj,
+        \get_class($obj)
+    )();
+}
+class a { private $help = 'abc'; }
+
+var_dump(getVar(new a, 'help'));
+?>
+--EXPECTF--
+string(3) "abc"

jphp-runtime/src/php/runtime/lang/Closure.java

@@ -160,8 +160,8 @@ public static Memory bind(Environment env, Memory... args) throws CloneNotSuppor
         Closure closure = args[0].toObject(Closure.class);
 
         Closure newClosure = (Closure) closure.clone();
-        newClosure.self = args[0];
-        newClosure.scope = args[1].toString();
+        newClosure.self = args[1];
+        newClosure.scope = args[2].toString();
         return new ObjectMemory(newClosure);
     }