https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89538
--- Comment #1 from Taewook Oh <twoh at fb dot com> --- And I confirmed that this bug doesn't reproduce with GCC5.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89538
--- Comment #1 from Taewook Oh <twoh at fb dot com> --- And I confirmed that this bug doesn't reproduce with GCC5.