I am very new with GO, and when I tried to install the framwork beego on my Windows 8 Desktop or in a VirtualBox with Debian8 I had the same error:
sergi@odoo:~$ go get github.com/astaxie/beego
# github.com/astaxie/beego
work/src/github.com/astaxie/beego/tree.go:144: syntax error: unexpected range, expecting {
work/src/github.com/astaxie/beego/tree.go:155: syntax error: unexpected else, expecting semicolon or newline
work/src/github.com/astaxie/beego/tree.go:157: non-declaration statement outside function body
work/src/github.com/astaxie/beego/tree.go:158: non-declaration statement outside function body
work/src/github.com/astaxie/beego/tree.go:159: non-declaration statement outside function body
work/src/github.com/astaxie/beego/tree.go:160: syntax error: unexpected }
work/src/github.com/astaxie/beego/tree.go:257: syntax error: unexpected range, expecting {
work/src/github.com/astaxie/beego/tree.go:267: syntax error: unexpected else, expecting semicolon or newline or }
work/src/github.com/astaxie/beego/tree.go:283: syntax error: unexpected }