https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120658
--- Comment #4 from newbie-02 <newbie-02 at gmx dot de> --- @Eric Botcazou: whow, thank you! ( despite I understand the analysis details as well as Chinese. ) One additional question: can you propose how to do better, how to avoid such fails? Were programming rules violated here?