Modules: fixed memory leak when module loading failed.

Author: xeioex

nginx/ngx_js.c

@@ -665,6 +665,7 @@ ngx_njs_clone(ngx_js_ctx_t *ctx, ngx_js_loc_conf_t *cf, void *external)
 
     engine = njs_mp_alloc(njs_vm_memory_pool(vm), sizeof(ngx_engine_t));
     if (engine == NULL) {
+        njs_vm_destroy(vm);
         return NULL;
     }
 
@@ -677,6 +678,8 @@ ngx_njs_clone(ngx_js_ctx_t *ctx, ngx_js_loc_conf_t *cf, void *external)
 
         ngx_log_error(NGX_LOG_ERR, ctx->log, 0, "js exception: %V", &exception);
 
+        njs_vm_destroy(vm);
+
         return NULL;
     }