Panic with private gitlab

[ahiaht]

I tried to connect to a private gitlab-ce following the document for gitlab. Everything fine until I tried to create a null resource and add comment, Atlantis return PANIC error:
#atlantis server --atlantis-url="http://atlantis:4141" --gitlab-user="atlantis-bot" --gitlab-token="****************" --gitlab-webhook-secret="**************" --repo-whitelist="gitlab-ce/itarch/terraform-infra" --gitlab-hostname="http://gitlab-ce"

2018/12/13 06:33:33 [INFO] server: Determined GitLab is running version 11.5.3
2018/12/13 06:33:35 [INFO] server: Atlantis started - listening on port 4141
2018/12/13 06:33:57 PANIC: runtime error: invalid memory address or nil pointer dereference
goroutine 44 [running]:
github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni.(*Recovery).ServeHTTP.func1(0x7fedf4b2e130, 0xc0002a0e00, 0xc000262fc0)
	/Users/lkysow/go/src/github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni/recovery.go:34 +0xef
panic(0xa56e60, 0x1090c60)
	/usr/local/go/src/runtime/panic.go:513 +0x1b9
github.com/runatlantis/atlantis/server/events.(*EventParser).ParseGitlabMergeRequestCommentEvent(0xc000271810, 0xc0002a2940, 0x4, 0xc000356500, 0x1, 0xc0002a2d60, 0xf, 0x0, 0x0, 0x0, ...)
	/Users/lkysow/go/src/github.com/runatlantis/atlantis/server/events/event_parser.go:533 +0x1eb
github.com/runatlantis/atlantis/server.(*EventsController).HandleGitlabCommentEvent(0xc00012c2d0, 0x7fedf4b2e130, 0xc0002a0e00, 0xc0002a2940, 0x4, 0xc000356500, 0x1, 0xc0002a2d60, 0xf, 0x0, ...)
	/Users/lkysow/go/src/github.com/runatlantis/atlantis/server/events_controller.go:337 +0xef
github.com/runatlantis/atlantis/server.(*EventsController).handleGitlabPost(0xc00012c2d0, 0x7fedf4b2e130, 0xc0002a0e00, 0xc0002ad200)
	/Users/lkysow/go/src/github.com/runatlantis/atlantis/server/events_controller.go:323 +0x3fc
github.com/runatlantis/atlantis/server.(*EventsController).Post(0xc00012c2d0, 0x7fedf4b2e130, 0xc0002a0e00, 0xc0002ad200)
	/Users/lkysow/go/src/github.com/runatlantis/atlantis/server/events_controller.go:90 +0x1ff
github.com/runatlantis/atlantis/server.(*EventsController).Post-fm(0x7fedf4b2e130, 0xc0002a0e00, 0xc0002ad200)
	/Users/lkysow/go/src/github.com/runatlantis/atlantis/server/server.go:355 +0x48
net/http.HandlerFunc.ServeHTTP(0xc0001fdee0, 0x7fedf4b2e130, 0xc0002a0e00, 0xc0002ad200)
	/usr/local/go/src/net/http/server.go:1964 +0x44
github.com/runatlantis/atlantis/vendor/github.com/gorilla/mux.(*Router).ServeHTTP(0xc0002717a0, 0x7fedf4b2e130, 0xc0002a0e00, 0xc0002ad200)
	/Users/lkysow/go/src/github.com/runatlantis/atlantis/vendor/github.com/gorilla/mux/mux.go:162 +0xf1
github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni.Wrap.func1(0x7fedf4b2e130, 0xc0002a0e00, 0xc0002ad000, 0xc00029ecc0)
	/Users/lkysow/go/src/github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni/negroni.go:41 +0x4d
github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni.HandlerFunc.ServeHTTP(0xc000263060, 0x7fedf4b2e130, 0xc0002a0e00, 0xc0002ad000, 0xc00029ecc0)
	/Users/lkysow/go/src/github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni/negroni.go:24 +0x4e
github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni.middleware.ServeHTTP(0xbed4e0, 0xc000263060, 0xc0002630c0, 0x7fedf4b2e130, 0xc0002a0e00, 0xc0002ad000)
	/Users/lkysow/go/src/github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni/negroni.go:33 +0x9c
github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni.middleware.ServeHTTP-fm(0x7fedf4b2e130, 0xc0002a0e00, 0xc0002ad000)
	/Users/lkysow/go/src/github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni/negroni.go:33 +0x60
github.com/runatlantis/atlantis/server.(*RequestLogger).ServeHTTP(0xc00009a410, 0x7fedf4b2e130, 0xc0002a0e00, 0xc0002ad000, 0xc00029eca0)
	/Users/lkysow/go/src/github.com/runatlantis/atlantis/server/middleware.go:37 +0x62
github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni.middleware.ServeHTTP(0xbec140, 0xc00009a410, 0xc0002630a0, 0x7fedf4b2e130, 0xc0002a0e00, 0xc0002ad000)
	/Users/lkysow/go/src/github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni/negroni.go:33 +0x9c
github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni.middleware.ServeHTTP-fm(0x7fedf4b2e130, 0xc0002a0e00, 0xc0002ad000)
	/Users/lkysow/go/src/github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni/negroni.go:33 +0x60
github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni.(*Recovery).ServeHTTP(0xc000262fc0, 0x7fedf4b2e130, 0xc0002a0e00, 0xc0002ad000, 0xc00029ec80)
	/Users/lkysow/go/src/github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni/recovery.go:45 +0x82
github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni.middleware.ServeHTTP(0xbec680, 0xc000262fc0, 0xc000263080, 0x7fedf4b2e130, 0xc0002a0e00, 0xc0002ad000)
	/Users/lkysow/go/src/github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni/negroni.go:33 +0x9c
github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni.(*Negroni).ServeHTTP(0xc0003d6a50, 0xbf16e0, 0xc00042a000, 0xc0002ad000)
	/Users/lkysow/go/src/github.com/runatlantis/atlantis/vendor/github.com/urfave/negroni/negroni.go:73 +0xe8
net/http.serverHandler.ServeHTTP(0xc0002a7450, 0xbf16e0, 0xc00042a000, 0xc0002ad000)
	/usr/local/go/src/net/http/server.go:2741 +0xab
net/http.(*conn).serve(0xc000355400, 0xbf1b60, 0xc0002a0c40)
	/usr/local/go/src/net/http/server.go:1847 +0x646
created by net/http.(*Server).Serve
	/usr/local/go/src/net/http/server.go:2851 +0x2f5

Terraform: 0.11.10
Gitlab-ce 11.5.3
Atlantis 0.4.12

Any idea what's wrong ?

[lkysow]

@ahiaht are you commenting on a merge request? I've seen this error for users commenting on a commit instead of the merge request.

[ahiaht]

I did on a commit request.
P/S: How do i trigger atlantis without merge request for gitlab ?

[lkysow]

You can't trigger Atlantis unless it's via a merge request. Atlantis is specialized for working on merge requests.

[lkysow]

I'm going to close this since it's not a bug but feel free to ask more questions.