minor improvement

lyokha · Jul 12, 2022 · b3f4ea5 · b3f4ea5
1 parent ff46898
commit b3f4ea5
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/src/ngx_http_haskell_module.c b/src/ngx_http_haskell_module.c
@@ -1806,9 +1806,11 @@ ngx_http_haskell_run(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
                            mcf->request_var_name.data,
                            mcf->request_var_name.len);
                 expr.data[2 + mcf->request_var_name.len] = '}';
-                ngx_memcpy(expr.data + 2 + mcf->request_var_name.len + 1,
-                           value[3].data,
-                           value[3].len);
+                if (value[3].len > 0) {
+                    ngx_memcpy(expr.data + 2 + mcf->request_var_name.len + 1,
+                               value[3].data,
+                               value[3].len);
+                }
                 ccv.value = &expr;
             } else {
                 ccv.value = &value[3 + i];