https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109426
--- Comment #5 from Xi Ruoyao <xry111 at gcc dot gnu.org> --- (In reply to Jonathan Wakely from comment #4) > N.B. this code is just copied from PR 54402. It might have been helpful to > say where you found the code. > > zhonghao, it's really not helpful to just copy&paste code that you don't > understand into bug reports with stupid, incorrect claims like "while > expanding templates". Maybe you're trying to be helpful, but you're just > wasting our time. I'm wondering if this is an attempt for some kind of "academic research" here like the notorious UMN incident in LKML.