Fail to bootstrap (Segmentation fault) on ppc64el in Xenial

[Utkarsh Gupta]

Hellu,

There's segmentation fault on ppc64el whilst backporting Golang 1.18 to Xenial.

Here are the snippet:

make[1]: Entering directory '/<<PKGBUILDDIR>>'
[ -f VERSION ] || echo "debian snapshot 1.18.1-1ubuntu1~16.04.4" > VERSION
# on i386, need to rebuild with go1.16 for GO386=softfloat
export GOROOT_BOOTSTRAP=$(env -i GOPATH=/<<PKGBUILDDIR>>/gopath/ go env GOROOT) \
&& if [ "ppc64el" = "i386" ] && dpkg --compare-versions $(GOROOT_BOOTSTRAP=/usr ./debian/helpers/goenv.sh echo '$GOVERSION_BOOTSTRAP') lt "1.16"; then \
 mkdir -p /<<PKGBUILDDIR>>/bootstrap \
 && cp -Rp /<<PKGBUILDDIR>>/src bootstrap/ \
 && cp -Rp /<<PKGBUILDDIR>>/VERSION bootstrap/ \
 && cd /<<PKGBUILDDIR>>/bootstrap/src \
 && /<<PKGBUILDDIR>>/debian/helpers/goenv.sh bash ./make.bash --no-banner \
 && export GOROOT_BOOTSTRAP=/<<PKGBUILDDIR>>/bootstrap; \
fi \
&& cd /<<PKGBUILDDIR>>/src \
&& /<<PKGBUILDDIR>>/debian/helpers/goenv.sh bash ./make.bash --no-banner
Building Go cmd/dist using /usr/lib/go-1.6. (go1.6.2 linux/ppc64le)
go build _/<<PKGBUILDDIR>>/src/cmd/dist: /usr/lib/go-1.6/pkg/tool/linux_ppc64le/compile: signal: segmentation fault (core dumped)
debian/rules:119: recipe for target 'override_dh_auto_build-arch' failed
make[1]: *** [override_dh_auto_build-arch] Error 1
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
debian/rules:32: recipe for target 'build-arch' failed
make: *** [build-arch] Error 2

Full logs are available at:
https://pastebin.canonical.com/p/qB8m27sH49/