+ if (!g_utf8_validate (s->str, -1, &end_valid))
+ {
+ gint offset;
+ gchar *valid_str;
+ offset = (gint) (end_valid - s->str);
+ valid_str = g_strndup (s->str, offset);
+ g_set_error (error,
+ G_IO_ERROR,
+ G_IO_ERROR_INVALID_ARGUMENT,
+ _("Expected valid UTF-8 string but found invalid bytes at byte offset %d (length of string is %d). "
+ "The valid UTF-8 string up until that that point was `%s'"),
+ offset,
+ (gint) s->len,
+ valid_str);
+ g_free (valid_str);
+ goto fail;
+ }