1 files changed, 6 insertions, 0 deletions
diff --git a/nginx/ngx_http_js_module.c b/nginx/ngx_http_js_module.c
index c6249548..21bcc26a 100644
--- a/nginx/ngx_http_js_module.c
+++ b/nginx/ngx_http_js_module.c
@@ -4773,6 +4773,12 @@ ngx_http_js_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
 
     *fname = value[2];
 
+    if (v->get_handler == ngx_http_js_variable_set) {
+        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+                           "variable \"%V\" is already declared", &value[1]);
+        return NGX_CONF_ERROR;
+    }
+
     v->get_handler = ngx_http_js_variable_set;
     v->data = (uintptr_t) fname;