[18.06] Return error if basename is expanded to blank

[thaJeztah]

cherry-pick of moby#37396 for 18.06

git checkout -b 18.06-backport-error_when_base_name_resolved_to_blank ce-engine/18.06
git cherry-pick -s -S -x c9542d313e2a52807644742e5fd684bc2de9f507

cherry-pick was clean; no conflicts

Fix: moby#37325

[andrewhsu]

I see green tests, but not sure if I'm looking in the wrong place I can't seem to find TestFromWithArgButBuildArgsNotGiven.

[thaJeztah]

Ah powerpc terminated before that test;

  --- FAIL: TestExternalGraphDriver/pull (0.93s)
23:01:57     	external_test.go:402: assertion failed: error is not nil: Error: No such image: busybox:latest

[thaJeztah]

PowerPC https://jenkins.dockerproject.org/job/Docker-PRs-powerpc/10732/console failing on a flaky test
moby#34988

15:21:58 FAIL: docker_api_swarm_test.go:359: DockerSwarmSuite.TestAPISwarmRaftQuorum
15:21:58 
15:21:58 [de026b00cea4f] waiting for daemon to start
15:21:58 [de026b00cea4f] daemon started
15:21:58 
15:21:58 [db40b84748f09] waiting for daemon to start
15:21:58 [db40b84748f09] daemon started
15:21:58 
15:21:58 [da6f923c3d37d] waiting for daemon to start
15:21:58 [da6f923c3d37d] daemon started
15:21:58 
15:21:58 [db40b84748f09] exiting daemon
15:21:58 [da6f923c3d37d] exiting daemon
15:21:58 docker_api_swarm_test.go:385:
15:21:58     // d1 will eventually step down from leader because there is no longer an active quorum, wait for that to happen
15:21:58     waitAndAssert(c, defaultReconciliationTimeout, func(c *check.C) (interface{}, check.CommentInterface) {
15:21:58         _, err = cli.ServiceCreate(context.Background(), service.Spec, types.ServiceCreateOptions{})
15:21:58         return err.Error(), nil
15:21:58     }, checker.Contains, "Make sure more than half of the managers are online.")
15:21:58 docker_utils_test.go:435:
15:21:58     c.Assert(v, checker, args...)
15:21:58 ... obtained string = "Error response from daemon: rpc error: code = DeadlineExceeded desc = context deadline exceeded"
15:21:58 ... substring string = "Make sure more than half of the managers are online."
15:21:58 
15:21:58 [de026b00cea4f] exiting daemon

[andrewhsu]

LGTM