Dgraph: Alpha 1.2.0-rc1 panics

[emicklei]

What version of Dgraph are you using?

1.2.0-rc1

Have you tried reproducing the issue with the latest release?

No

What is the hardware spec (RAM, OS)?

GKE using n1-standard-1 machine type. Linux

Steps to reproduce the issue (command/config used to run Dgraph).

I lack the knowledge to reproduce this

Expected behaviour and actual result.

Handle the nil value in the code.

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x1404dd1]

goroutine 73 [running]:
github.com/dgraph-io/dgraph/worker.(*groupi).AnyTwoServers(0x0, 0x1, 0x0, 0x0, 0x0)
    /tmp/go/src/github.com/dgraph-io/dgraph/worker/groups.go:497 +0x51
github.com/dgraph-io/dgraph/worker.SubscribeForUpdates(0xc02b320d60, 0x1, 0x1, 0xc02c562e70, 0x1)
    /tmp/go/src/github.com/dgraph-io/dgraph/worker/groups.go:1048 +0x4a
created by github.com/dgraph-io/dgraph/graphql/admin.newAdminResolver
    /tmp/go/src/github.com/dgraph-io/dgraph/graphql/admin/admin.go:181 +0x285

[MichelDiz]

I'm not sure, but someone was working on this problem.

[ashish-goswami]

Hey @emicklei @MichelDiz , this should be fixed by https://github.com/dgraph-io/dgraph/pull/4626.