Fix buffer overflow if output iterator is std::back_insert_iterator and value is escaped (debug format)

Signed-off-by: Vladislav Shchapov <vladislav@shchapov.ru>
2024-01-10 09:15:16 -08:00
parent 401f087394
commit 961df829b9
2 changed files with 15 additions and 2 deletions
@@ -2388,9 +2388,12 @@ FMT_CONSTEXPR auto write(OutputIt out, basic_string_view<Char> s,
    size = code_point_index(s, to_unsigned(specs.precision));
  bool is_debug = specs.type == presentation_type::debug;
  size_t width = 0;
+
+  if (is_debug) size = write_escaped_string(counting_iterator{}, s).count();
+
  if (specs.width != 0) {
    if (is_debug)
-      width = write_escaped_string(counting_iterator{}, s).count();
+      width = size;
    else
      width = compute_width(basic_string_view<Char>(data, size));
  }