log_error        1132 contrib/tools/pngfix.c    log_error(file, code, what);
log_error        1741 contrib/tools/pngfix.c    log_error(file, INVALID_ERROR_CODE, "iTXt chunk length");
log_error        3589 contrib/tools/pngfix.c       log_error(&control->file, LIBPNG_ERROR_CODE, "OOM allocating png_struct");