fix(zend): allocate erased list-typed bound on the compile arena to match its arena bit

Signed-off-by: azjezz <azjezz@protonmail.com>

Author: azjezz

Zend/tests/generics/declaration/no_leak_dnf_bound.phpt

@@ -0,0 +1,17 @@
+--TEST--
+Generics: declaring a class with a DNF-typed bound does not leak memory
+--FILE--
+<?php
+interface A {}
+interface B {}
+interface C {}
+
+class Holder<T: (A&B)|C> {
+    public function take(T $x): void {}
+    public function get(): T {}
+}
+
+echo "ok\n";
+?>
+--EXPECT--
+ok

Zend/tests/generics/declaration/no_leak_intersection_bound.phpt

@@ -0,0 +1,15 @@
+--TEST--
+Generics: declaring a class with an intersection-typed bound does not leak memory
+--FILE--
+<?php
+interface A {}
+interface B {}
+
+class Holder<T: A&B> {
+    public function take(T $x): void {}
+}
+
+echo "ok\n";
+?>
+--EXPECT--
+ok

Zend/tests/generics/declaration/no_leak_union_bound.phpt

@@ -0,0 +1,15 @@
+--TEST--
+Generics: declaring a class with a union-typed bound does not leak memory
+--FILE--
+<?php
+interface A {}
+interface B {}
+
+class Holder<T: A|B> {
+    public function take(T $x): void {}
+}
+
+echo "ok\n";
+?>
+--EXPECT--
+ok

Zend/zend_compile.c

@@ -5824,7 +5824,7 @@ static zend_result zend_compile_func_array_map(znode *result, zend_ast_list *arg
 	 * breaking for the generated call.
 	 */
 	if (callback->kind == ZEND_AST_CALL
-	 && callback->child[0]->kind == ZEND_AST_ZVAL 
+	 && callback->child[0]->kind == ZEND_AST_ZVAL
 	 && Z_TYPE_P(zend_ast_get_zval(callback->child[0])) == IS_STRING
 	 && zend_string_equals_literal_ci(zend_ast_get_str(callback->child[0]), "assert")) {
 		return FAILURE;
@@ -8090,7 +8090,7 @@ static zend_type zend_compile_single_typename(zend_ast *ast)
 				} else if (ZEND_TYPE_HAS_LIST(result)) {
 					zend_type_list *orig_list = ZEND_TYPE_LIST(result);
 					size_t list_size = ZEND_TYPE_LIST_SIZE(orig_list->num_types);
-					zend_type_list *copy = emalloc(list_size);
+					zend_type_list *copy = zend_arena_alloc(&CG(arena), list_size);
 					memcpy(copy, orig_list, list_size);
 					for (uint32_t i = 0; i < copy->num_types; i++) {
 						if (ZEND_TYPE_HAS_NAME(copy->types[i])) {