Travis build fail.
OS - Ubuntu Trusty Tahr
Adding APT Sources 1.33s$ sudo -E apt-add-repository -y "ppa:ubuntu-toolchain-r/test" gpg: keyring `/tmp/tmp61coc1rv/secring.gpg' created gpg: keyring `/tmp/tmp61coc1rv/pubring.gpg' created gpg: requesting key BA9EF27F from hkp server keyserver.ubuntu.com gpg: /tmp/tmp61coc1rv/trustdb.gpg: trustdb created gpg: key BA9EF27F: public key "Launchpad Toolchain builds" imported gpg: Total number processed: 1 gpg: imported: 1 (RSA: 1) OK 9.34s$ travis_apt_get_update Installing APT Packages 0.67s$ sudo -E apt-get -yq --no-install-suggests --no-install-recommends $(travis_apt_get_options) install google-chrome-stable g++-4.8 Reading package lists... Building dependency tree... Reading state information... The following packages were automatically installed and are no longer required: libappindicator1 libdbusmenu-gtk4 libindicator7 Use 'sudo apt autoremove' to remove them. The following additional packages will be installed: cpp-4.8 gcc-4.8 gcc-4.8-base gcc-9-base libasan0 libatomic1 libgcc-4.8-dev libgomp1 libisl15 libitm1 libmpfr4 libquadmath0 libstdc++-4.8-dev libstdc++6 libtsan0 Suggested packages: gcc-4.8-locales g++-4.8-multilib gcc-4.8-doc libstdc++6-4.8-dbg gcc-4.8-multilib libgcc1-dbg libgomp1-dbg libitm1-dbg libatomic1-dbg libasan0-dbg libtsan0-dbg libquadmath0-dbg libstdc++-4.8-doc Recommended packages: libu2f-udev The following NEW packages will be installed: gcc-9-base libisl15 The following packages will be upgraded: cpp-4.8 g++-4.8 gcc-4.8 gcc-4.8-base google-chrome-stable libasan0 libatomic1 libgcc-4.8-dev libgomp1 libitm1 libmpfr4 libquadmath0 libstdc++-4.8-dev libstdc++6 libtsan0 15 upgraded, 2 newly installed, 0 to remove and 293 not upgraded. Need to get 94.5 MB of archives. After this operation, 40.0 MB of additional disk space will be used. WARNING: The following packages cannot be authenticated! google-chrome-stable E: There were unauthenticated packages and -y was used without --allow-unauthenticated apt-get.diagnostics apt-get install failed The command "sudo -E apt-get -yq --no-install-suggests --no-install-recommends $(travis_apt_get_options) install google-chrome-stable g++-4.8" failed and exited with 100 during . Your build has been stopped.