diff --git a/examples/binary-tree.php b/examples/binary-tree.php
new file mode 100644
index 00000000..9db2cd7c
--- /dev/null
+++ b/examples/binary-tree.php
@@ -0,0 +1,93 @@
+<?php
+
+/* The Computer Language Benchmarks Game
+   https://salsa.debian.org/benchmarksgame-team/benchmarksgame/
+
+   contributed by Peter Baltruschat
+   modified by Levi Cameron
+   multiprocessing by Yuriy Moskalchuk
+*/
+
+function createTree($depth)
+{
+    echo '';
+    if (!$depth) {
+        return [null, null];
+    }
+    $depth--;
+
+    return [
+        createTree($depth),
+        createTree($depth)
+    ];
+}
+
+function checkTree($treeNode)
+{
+    return 1
+        + ($treeNode[0][0] === null ? 1 : checkTree($treeNode[0]))
+        + ($treeNode[1][0] === null ? 1 : checkTree($treeNode[1]));
+}
+
+
+function startWorker($depth, $iter, $n, $size, $shmId)
+{
+    $pid = pcntl_fork();
+    if ($pid) {
+        return $pid;
+    } else {
+        $check = 0;
+        for ($i = 1; $i <= $iter; ++$i) {
+            $t = createTree($depth);
+            $check += checkTree($t);
+            unset($t);
+        }
+        $result = "$iter\t trees of depth $depth\t check: $check\n";
+        shmop_write($shmId, $result, $size * ($n - 1));
+        exit(0);
+    }
+}
+
+function main()
+{
+    global $argc, $argv;
+    $minDepth = 4;
+    $n = ($argc == 2) ? $argv[1] : 1;
+    $maxDepth = max($minDepth + 2, $n);
+    $stretchDepth = $maxDepth + 1;
+
+    $stretchTree = createTree($stretchDepth);
+    echo "stretch tree of depth $stretchDepth\t check: ", checkTree($stretchTree), PHP_EOL;
+    unset($stretchTree);
+
+    $longLivedTree = createTree($maxDepth);
+
+    $iterations = 1 << ($maxDepth);
+    $depthIterations = [$minDepth => $iterations];
+    do {
+        $minDepth += 2;
+        if ($minDepth <= $maxDepth) {
+            $iterations >>= 2;
+            $depthIterations[$minDepth] = $iterations;
+        }
+    } while ($minDepth <= $maxDepth);
+
+    $size = 128;
+    $shmId = shmop_open(ftok(__FILE__, 'b'), 'c', 0644, $size * (count($depthIterations) + 1));
+    $PIDs = [];
+    $n = 0;
+    foreach ($depthIterations as $d => $i) {
+        $PIDs[] = startWorker($d, $i, ++$n, $size, $shmId);
+    }
+    foreach ($PIDs as $PID) {
+        pcntl_waitpid($PID, $status);
+    }
+    foreach (range(1, count($depthIterations)) as $n) {
+        echo trim(shmop_read($shmId, $size * ($n - 1), $size)), PHP_EOL;
+    }
+    shmop_delete($shmId);
+
+    echo "long lived tree of depth $maxDepth\t check: ", checkTree($longLivedTree), PHP_EOL;
+}
+
+main();
\ No newline at end of file
diff --git a/examples/unset.php b/examples/unset.php
new file mode 100644
index 00000000..42664aab
--- /dev/null
+++ b/examples/unset.php
@@ -0,0 +1,11 @@
+<?php
+function main()
+{
+    $array['hello'] = 'world';
+    $name = 'world';
+    $object = new stdClass();
+    $object->hello = 'world';
+    unset($array['hello'], $name, $object->hello);
+
+    var_dump($array, $object);
+}
diff --git a/src/Php/Encryptor.php b/src/Php/Encryptor.php
index bd90fe6b..9ca7241a 100644
--- a/src/Php/Encryptor.php
+++ b/src/Php/Encryptor.php
@@ -125,7 +125,7 @@ class Encryptor extends \PhpAot\Core\Translator
             case 'Stmt_Switch':
                 break;
             default:
-                debug($node);
+                abort($node);
         }
     }
 
@@ -172,7 +172,7 @@ class Encryptor extends \PhpAot\Core\Translator
                 case 'Stmt_Switch':
                     break;
                 default:
-                    debug($v);
+                    abort($v);
             }
         }
         $code = '';
@@ -218,7 +218,7 @@ class Encryptor extends \PhpAot\Core\Translator
                 $this->parseConstFetch($expr);
                 break;
             default:
-                debug($expr);
+                abort($expr);
         }
     }
 
@@ -276,7 +276,7 @@ class Encryptor extends \PhpAot\Core\Translator
             case 'Expr_Array':
                 return 'php::Array';
             default:
-                debug($expr);
+                abort($expr);
         }
     }
 
@@ -310,7 +310,7 @@ class Encryptor extends \PhpAot\Core\Translator
             case 'float':
                 return 'double';
             default:
-                debug($type);
+                abort($type);
         }
     }
 
diff --git a/src/Php/Translator.php b/src/Php/Translator.php
index a7692696..a0d976fd 100644
--- a/src/Php/Translator.php
+++ b/src/Php/Translator.php
@@ -90,7 +90,7 @@ class Translator extends \PhpAot\Core\Translator
                     $cppCode .= $this->parseFunctionDef($v) . PHP_EOL;
                     break;
                 default:
-                    debug($v);
+                    abort($v);
             }
         }
         return $cppCode;
@@ -213,7 +213,7 @@ class Translator extends \PhpAot\Core\Translator
         $lines = [];
         foreach ($stmts as $v) {
             $class = $v->getType();
-            // $this->writeLog('Line ' . $this->getLine($v) . ': ' . $class);
+             $this->writeLog('Line ' . $this->getLine($v) . ': ' . $class);
             switch ($class) {
                 case 'Stmt_Expression':
                     $lines[] = $this->parseExpr($v->expr) . ';';
@@ -245,8 +245,11 @@ class Translator extends \PhpAot\Core\Translator
                 case 'Stmt_Global':
                     $lines[] = $this->parseGlobal($v);
                     break;
+                case 'Stmt_Unset':
+                    $lines[] = $this->parseUnset($v);
+                    break;
                 default:
-                    debug($v);
+                    abort($v);
             }
         }
         $code = '';
@@ -259,6 +262,7 @@ class Translator extends \PhpAot\Core\Translator
     private function parseExpr(mixed $expr)
     {
         $type = $expr->getType();
+        $this->writeLog('Line ' . $this->getLine($expr) . ': ' . $type);
         switch ($type) {
             case 'Expr_Assign':
                 return $this->parseAssign($expr);
@@ -320,6 +324,8 @@ class Translator extends \PhpAot\Core\Translator
                 return $this->parseArray($expr);
             case 'Expr_ArrayDimFetch':
                 return $this->parseArrayDimFetch($expr);
+            case 'Expr_PropertyFetch':
+                return $this->parsePropertyFetch($expr);
             case 'Expr_BinaryOp_ShiftLeft':
                 return $this->parseBinaryOpShiftLeft($expr);
             case 'Expr_BinaryOp_ShiftRight':
@@ -364,17 +370,40 @@ class Translator extends \PhpAot\Core\Translator
             case 'Expr_Exit':
                 return $this->parseExit($expr);
             default:
-                debug($expr);
+                abort($expr);
         }
     }
 
     private function parseAssign(Node $v): string
     {
-        $var = $this->parseIdentifier($v->var);
-        $expr = $this->parseExpr($v->expr);
+        $left = $v->var;
+        $right = $v->expr;
+
+        if ($left->getType() === 'Expr_ArrayDimFetch') {
+            $array = $this->parseIdentifier($left->var);
+            $code = '';
+            // 这是 PHP 的初始化+赋值写法，需要先创建数组
+            if (!$this->hasVar($array)) {
+                $this->addVar($array, self::TYPE_VAR);
+                $code .= self::TYPE_ARRAY . " $array;\n" . $this->getIndent();
+            }
+            $dim = $this->parseIdentifier($left->dim);
+            return $code . "$array.offsetSet($dim, " . $this->parseExpr($right) . ")";
+        } elseif ($left->getType() === 'Expr_PropertyFetch') {
+            $array = $this->parseIdentifier($left->var);
+            $propName = $this->parseIdentifier($left->name);
+            return "$array.setProperty(\"$propName\", " . $this->parseExpr($right) . ")";
+        }
+
+        $var = $this->parseIdentifier($left);
+        $expr = $this->parseExpr($right);
 
         if (!$this->hasVar($var)) {
-            $type = $this->detectType($v->expr);
+            if ($right->getType() === 'Expr_New') {
+                $type = self::TYPE_OBJECT;
+            } else {
+                $type = $this->detectType($right);
+            }
             $this->addVar($var, $type);
             return $type . ' ' . $var . ' = ' . $expr;
         } else {
@@ -493,7 +522,7 @@ class Translator extends \PhpAot\Core\Translator
             case 'bool':
                 return self::TYPE_BOOL;
             default:
-                debug($type);
+                abort($type);
         }
     }
 
@@ -928,9 +957,9 @@ class Translator extends \PhpAot\Core\Translator
         $className = $this->parseIdentifier($expr->class);
         $args = $expr->args;
         if (empty($args)) {
-            return 'new ' . $className . '()';
+            return 'php::newObject("' . $className . '")';
         } else {
-            return 'new ' . $className . '(' . $this->parseArgs($args) . ')';
+            return 'php::newObject("' . $className . '"(' . $this->parseArgs($args) . ')';
         }
     }
 
@@ -959,7 +988,7 @@ class Translator extends \PhpAot\Core\Translator
                     }
                     break;
                 default:
-                    debug($v2);
+                    abort($v2);
             }
         }
         $this->namespace = '';
@@ -981,7 +1010,7 @@ class Translator extends \PhpAot\Core\Translator
                     $code .= $this->parseFunctionDef($v) . PHP_EOL;
                     break;
                 default:
-                    debug($v);
+                    abort($v);
             }
         }
         $this->class = '';
@@ -1081,4 +1110,33 @@ class Translator extends \PhpAot\Core\Translator
     {
         return 'php::exit(' . $this->parseIdentifier($node->expr) . ')';
     }
+
+    private function parseUnset(Node $node): string
+    {
+        $vars = $node->vars;
+        $lines = [];
+        foreach ($vars as $var) {
+            $type = $var->getType();
+            if ($type === 'Expr_ArrayDimFetch') {
+                $array = $this->parseIdentifier($var->var);
+                $dim = $this->parseIdentifier($var->dim);
+                $lines[] = $array . '.offsetUnset(' . $dim . ');';
+            } elseif ($type === 'Expr_PropertyFetch') {
+                $object = $this->parseIdentifier($var->var);
+                $propName = $this->parseIdentifier($var->name);
+                $lines[] = $object . '.unsetProperty("' . $propName . '");';
+            } elseif ($type === 'Expr_Variable') {
+                $name = $this->parseIdentifier($var);
+                $lines[] = "$name.unset();";
+            } else {
+                abort($var);
+            }
+        }
+        return implode(PHP_EOL . $this->getIndent(), $lines);
+    }
+
+    private function parsePropertyFetch(mixed $expr): string
+    {
+        return $this->parseIdentifier($expr->var) . '.getProperty(' . $this->parseIdentifier($expr->name) . ')';
+    }
 }
diff --git a/src/Python/Translator.php b/src/Python/Translator.php
index 76f246c0..db1af2c9 100644
--- a/src/Python/Translator.php
+++ b/src/Python/Translator.php
@@ -84,7 +84,7 @@ class Translator extends \PhpAot\Core\Translator
                 return $this->parseBinOp($attr);
             default:
                 var_dump(__METHOD__, __LINE__);
-                debug($attr);
+                abort($attr);
         }
     }
 
@@ -106,7 +106,7 @@ class Translator extends \PhpAot\Core\Translator
             case 'Attribute':
                 return $this->parseAttribute($fn->value) . '->' . $fn->attr;
             default:
-                debug($fn);
+                abort($fn);
         }
     }
 
@@ -240,7 +240,7 @@ class Translator extends \PhpAot\Core\Translator
             case 'GeneratorExp':
                 return $this->parseGeneratorExp($value);
             default:
-                debug($value);
+                abort($value);
                 break;
         }
     }
@@ -257,7 +257,7 @@ class Translator extends \PhpAot\Core\Translator
             $_args[] = $slice->step ? $this->parseTarget($slice->step) : 'null';
             return 'PyCore::slice(' . implode(', ', $_args) . ')';
         } else {
-            debug($slice);
+            abort($slice);
         }
     }
 
@@ -298,7 +298,7 @@ class Translator extends \PhpAot\Core\Translator
                     case 'Not':
                         return '!' . $operand;
                     default:
-                        debug($target);
+                        abort($target);
                         break;
                 }
                 break;
@@ -329,7 +329,7 @@ class Translator extends \PhpAot\Core\Translator
             case 'ListComp':
                 return $this->parseListComp($target);
             default:
-                debug($target);
+                abort($target);
                 break;
         }
     }
@@ -386,7 +386,7 @@ class Translator extends \PhpAot\Core\Translator
         if ($test->ops) {
             $ops = $test->ops;
             if (count($ops) != 1) {
-                debug($test);
+                abort($test);
             }
             $op = $ops[0]->_type;
             $comparators = $test->comparators;
@@ -458,7 +458,7 @@ class Translator extends \PhpAot\Core\Translator
             case 'Attribute':
                 return $this->parseAttribute($iter);
             default:
-                debug($iter);
+                abort($iter);
         }
     }
 
@@ -475,7 +475,7 @@ class Translator extends \PhpAot\Core\Translator
                 return $value . '[' . $this->parseSlice($node->slice) . ']';
             }
         } else {
-            debug($node);
+            abort($node);
         }
     }
 
@@ -603,7 +603,7 @@ class Translator extends \PhpAot\Core\Translator
                 $line = $this->parseCall($node) . ';';
                 break;
             default:
-                debug($node);
+                abort($node);
                 $line = '';
                 break;
         }
@@ -772,7 +772,7 @@ class Translator extends \PhpAot\Core\Translator
         $code = '[' . PHP_EOL;
         foreach ($dict->values as $k => $v) {
             if (empty($dict->keys[$k])) {
-                debug($v);
+                abort($v);
             }
             $key = $dict->keys[$k];
             $this->indentLevel++;
@@ -791,7 +791,7 @@ class Translator extends \PhpAot\Core\Translator
             case 'Or':
                 return $this->parseOr($value->values);
             default:
-                debug($value);
+                abort($value);
                 break;
         }
     }
@@ -943,7 +943,7 @@ class Translator extends \PhpAot\Core\Translator
         $expr = $this->parseValue($value->value);
         if ($value->format_spec and $value->format_spec->_type == 'JoinedStr') {
             if (count($value->format_spec->values) != 1) {
-                debug($value);
+                abort($value);
             }
             $format = $value->format_spec->values[0]->value;
             if ($format[0] == '.' and $format[-1] == 'f') {
@@ -974,6 +974,6 @@ class Translator extends \PhpAot\Core\Translator
 
     private function parseGeneratorExp($value)
     {
-        debug($value);
+        abort($value);
     }
 }
diff --git a/src/functions.php b/src/functions.php
index 4f7e5b7e..bdceaa02 100644
--- a/src/functions.php
+++ b/src/functions.php
@@ -2,7 +2,7 @@
 
 use PhpAot\Core\Translator;
 
-function debug($v)
+function abort($v)
 {
     /**
      * @var $translator Translator
@@ -25,13 +25,13 @@ function debug($v)
 function if_empty_debug($if_expr, $v)
 {
     if (empty($if_expr)) {
-        debug($v);
+        abort($v);
     }
 }
 
 function if_not_empty_debug($if_expr, $v)
 {
     if (!empty($if_expr)) {
-        debug($v);
+        abort($v);
     }
 }