"tip" version would crash during tests.
"tip" version would crash during tests.

$ eval "$(gimme tip)"
go version devel +2d5601d Sat Oct 10 00:49:00 2015 +0000 linux/amd64

Error message:
$ $HOME/gopath/bin/goveralls -service=travis-ci
flag provided but not defined: -coverprofile
Usage of /tmp/go-build082863029/github.com/otaviokr/topological-sort/_test/topological-sort.test: (...)
otaviokr/topological-sort