访问http://localhost:8080就抛异常

[machicao2013]

2015/10/18 10:44:34 [router.go:879] [C] the request url is /
2015/10/18 10:44:34 [router.go:880] [C] Handler crashed with error runtime error: invalid memory address or nil pointer dereference
2015/10/18 10:44:34 [router.go:886] [C] /usr/local/go/src/runtime/asm_amd64.s:401
2015/10/18 10:44:34 [router.go:886] [C] /usr/local/go/src/runtime/panic.go:387
2015/10/18 10:44:34 [router.go:886] [C] /usr/local/go/src/runtime/panic.go:42
2015/10/18 10:44:34 [router.go:886] [C] /usr/local/go/src/runtime/sigpanic_unix.go:26
2015/10/18 10:44:34 [router.go:886] [C] /home/maxingsong/reposity/recipes/beego/src/github.com/astaxie/beego/controller.go:575
2015/10/18 10:44:34 [router.go:886] [C] /home/maxingsong/reposity/recipes/beego/src/github.com/beego/admin/src/rbac/public.go:30
2015/10/18 10:44:34 [router.go:886] [C] /usr/local/go/src/runtime/asm_amd64.s:401
2015/10/18 10:44:34 [router.go:886] [C] /opt/development/go/src/reflect/value.go:419
2015/10/18 10:44:34 [router.go:886] [C] /opt/development/go/src/reflect/value.go:296
2015/10/18 10:44:34 [router.go:886] [C] /home/maxingsong/reposity/recipes/beego/src/github.com/astaxie/beego/router.go:803
2015/10/18 10:44:34 [router.go:886] [C] /opt/development/go/src/net/http/server.go:1703
2015/10/18 10:44:34 [router.go:886] [C] /opt/development/go/src/net/http/server.go:1204
2015/10/18 10:44:34 [router.go:886] [C] /usr/local/go/src/runtime/asm_amd64.s:2232
不知道是什么原因

[machicao2013]

./hello -syncdb 这一步执行成功了

[basung]

./hello -syncdb 这一步执行报错：
wangyaneMacBook% ./hello -syncdb
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x415090b]

goroutine 1 [running]:
github.com/astaxie/beego.(_beegoAppConfig).String(0x0, 0x4839610, 0x10, 0x0, 0x0)
/Users/wangyang/golang/src/github.com/astaxie/beego/config.go:110 +0x15b
github.com/beego/admin/src/models.(_Group).TableName(0xc820015180, 0x0, 0x0)
/Users/wangyang/golang/src/github.com/beego/admin/src/models/GroupModel.go:23 +0x44
reflect.Value.call(0x46ca6c0, 0xc820015180, 0x113, 0x47bfa90, 0x4, 0xc82015fb08, 0x0, 0x0, 0x0, 0x0, ...)
/usr/local/go/src/reflect/value.go:432 +0x120a
reflect.Value.Call(0x46ca6c0, 0xc820015180, 0x113, 0xc82015fb08, 0x0, 0x0, 0x0, 0x0, 0x0)
/usr/local/go/src/reflect/value.go:300 +0xb1
github.com/astaxie/beego/orm.getTableName(0x46ca6c0, 0xc820015180, 0x16, 0x0, 0x0)
/Users/wangyang/golang/src/github.com/astaxie/beego/orm/models_utils.go:35 +0x15a
github.com/astaxie/beego/orm.registerModel(0x0, 0x0, 0x46ca6c0, 0xc820015180)
/Users/wangyang/golang/src/github.com/astaxie/beego/orm/models_boot.go:36 +0x29b
github.com/astaxie/beego/orm.RegisterModelWithPrefix(0x0, 0x0, 0xc82015fed0, 0x1, 0x1)
/Users/wangyang/golang/src/github.com/astaxie/beego/orm/models_boot.go:313 +0x12e
github.com/astaxie/beego/orm.RegisterModel(0xc82015fed0, 0x1, 0x1)
/Users/wangyang/golang/src/github.com/astaxie/beego/orm/models_boot.go:303 +0x41
github.com/beego/admin/src/models.init.1()
/Users/wangyang/golang/src/github.com/beego/admin/src/models/GroupModel.go:27 +0x98
github.com/beego/admin/src/models.init()
/Users/wangyang/golang/src/github.com/beego/admin/src/models/UserModel.go:136 +0x77
github.com/beego/admin/src.init()
/Users/wangyang/golang/src/github.com/beego/admin/src/rbac.go:158 +0x59
github.com/beego/admin/src/rbac.init()
/Users/wangyang/golang/src/github.com/beego/admin/src/rbac/user.go:86 +0x40
github.com/beego/admin.init()
/Users/wangyang/golang/src/github.com/beego/admin/admin.go:41 +0x40
hello/routers.init()
/Users/wangyang/golang/src/hello/routers/router.go:12 +0x40
main.init()
/Users/wangyang/golang/src/hello/main.go:10 +0x3b

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
/usr/local/go/src/runtime/asm_amd64.s:1696 +0x1

goroutine 5 [syscall]:
os/signal.loop()
/usr/local/go/src/os/signal/signal_unix.go:22 +0x18
created by os/signal.init.1
/usr/local/go/src/os/signal/signal_unix.go:28 +0x37
wangyaneMacBook%