gen_stub: Fix generation for @generate-legacy-arginfo 70000

> Uncaught Error: Cannot indirectly modify readonly property ClassInfo::$constInfos in gen_stub.php:4158

Author: TimWolla

build/gen_stub.php

@@ -43,6 +43,10 @@ function reportFilePutContents(string $filename, string $content): void {
     }
 }
 
+function clone_fn(object $obj) {
+    return clone $obj;
+}
+
 if (!function_exists('array_any')) {
     function array_any(array $array, callable $callback): bool {
         foreach ($array as $key => $value) {
@@ -2184,9 +2188,7 @@ public function toArgInfoCode(?int $minPHPCompatibility): string {
 
     public function __clone()
     {
-        foreach ($this->args as $key => $argInfo) {
-            $this->args[$key] = clone $argInfo;
-        }
+        $this->args = array_map(clone_fn(...), $this->args);
         $this->return = clone $this->return;
     }
 }
@@ -4154,17 +4156,9 @@ private function createIncludeElement(DOMDocument $doc, string $query, int $inde
 
     public function __clone()
     {
-        foreach ($this->constInfos as $key => $constInfo) {
-            $this->constInfos[$key] = clone $constInfo;
-        }
-
-        foreach ($this->propertyInfos as $key => $propertyInfo) {
-            $this->propertyInfos[$key] = clone $propertyInfo;
-        }
-
-        foreach ($this->funcInfos as $key => $funcInfo) {
-            $this->funcInfos[$key] = clone $funcInfo;
-        }
+        $this->constInfos = array_map(clone_fn(...), $this->constInfos);
+        $this->propertyInfos = array_map(clone_fn(...), $this->propertyInfos);
+        $this->funcInfos = array_map(clone_fn(...), $this->funcInfos);
     }
 
     /**

ext/zend_test/test.stub.php

@@ -3,7 +3,7 @@
 /**
  * @generate-class-entries static
  * @generate-c-enums
- * @generate-legacy-arginfo 80000
+ * @generate-legacy-arginfo 70000
  * @undocumentable
  */
 namespace {