From fa31dfebcf707f8b6d2b10a9c8a462ef52f0356d Mon Sep 17 00:00:00 2001
From: Dmitry Volyntsev <xeioex@nginx.com>
Date: Thu, 3 Sep 2026 08:53:25 -0700
Subject: [PATCH] VM: clean up failed AST serialization

---
 src/njs_vm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/njs_vm.c b/src/njs_vm.c
index bbb7bb29..bd095269 100644
--- a/src/njs_vm.c
+++ b/src/njs_vm.c
@@ -241,11 +241,13 @@ njs_vm_compile(njs_vm_t *vm, u_char **start, u_char *end)
         NJS_CHB_MP_INIT(&chain, njs_vm_memory_pool(vm));
         ret = njs_parser_serialize_ast(parser.node, &chain);
         if (njs_slow_path(ret == NJS_ERROR)) {
+            njs_chb_destroy(&chain);
             njs_parser_destroy(&parser);
             return ret;
         }
 
         if (njs_slow_path(njs_chb_join(&chain, &ast) != NJS_OK)) {
+            njs_chb_destroy(&chain);
             njs_parser_destroy(&parser);
             return NJS_ERROR;
         }
-- 
2.47.3