https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86207
--- Comment #1 from zhonghao at pku dot org.cn --- BTW, clang++ accepts the above code.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86207
--- Comment #1 from zhonghao at pku dot org.cn --- BTW, clang++ accepts the above code.