[Bug middle-end/57625] internal compiler error: seg fault when building gcc 4.7.2

[mikpelinux at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57625

--- Comment #6 from Mikael Pettersson <mikpelinux at gmail dot com> ---
The failure of 4.7 being built w/ --disable-bootstrap by 4.8+ stopped with the
PR54638 fix in r191605.  It's clear that the problem was undefined behaviour in
4.7.2, not a wrong-code error in 4.8+.