If LTO was used here I'd say this was https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51744 but that doesn't appear to be the case from the log.
If LTO was used here I'd say this was https:/ /gcc.gnu. org/bugzilla/ show_bug. cgi?id= 51744 but that doesn't appear to be the case from the log.