    had_char_class   2171 libglibc/regex.c             boolean had_char_class = false;
    had_char_class   2226 libglibc/regex.c                 if (had_char_class && c == '-' && *p != ']')
    had_char_class   2316 libglibc/regex.c                         had_char_class = true;
    had_char_class   2364 libglibc/regex.c                         had_char_class = true;
    had_char_class   2374 libglibc/regex.c                         had_char_class = false;
    had_char_class   2379 libglibc/regex.c                     had_char_class = false;