dGraph 20.03 beta, importing dump from 1.2.2 fails

Hello,
I just tried last dGraph version, but I cannot import my RDF backup made with a 1.2.2, I get this error:

Dgraph version   : v20.03.0-beta.20200320
Dgraph SHA-256   : c92511f46c386fb173339cd25ce38fa3fb6b79c9daa83d8768f92acbb1771d0e
Commit SHA-1     : cc10d2ad
Commit timestamp : 2020-03-20 16:18:05 -0700
Branch           : HEAD
Go version       : go1.14.1

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panic: interface conversion: interface {} is nil, not int64

goroutine 171 [running]:
github.com/dgraph-io/dgraph/tok.IntTokenizer.Tokens(...)
	/tmp/go/src/github.com/dgraph-io/dgraph/tok/tok.go:193
github.com/dgraph-io/dgraph/tok.BuildTokens(0x0, 0x0, 0x1b5c980, 0x26061d0, 0x1b5c980, 0x26061d0, 0x0, 0x1, 0xc0013a3bc0)
	/tmp/go/src/github.com/dgraph-io/dgraph/tok/tok.go:107 +0x63
github.com/dgraph-io/dgraph/dgraph/cmd/live.(*loader).conflictKeysForNQuad(0xc0005461c0, 0xc000da9950, 0x8, 0x1, 0x1, 0x0, 0x0)
	/tmp/go/src/github.com/dgraph-io/dgraph/dgraph/cmd/live/batch.go:313 +0x497
github.com/dgraph-io/dgraph/dgraph/cmd/live.(*loader).conflictKeysForReq(0xc0005461c0, 0xc00194bf78, 0xc0011c6001, 0x7d0, 0x800)
	/tmp/go/src/github.com/dgraph-io/dgraph/dgraph/cmd/live/batch.go:334 +0xe6
github.com/dgraph-io/dgraph/dgraph/cmd/live.(*loader).makeRequests(0xc0005461c0)
	/tmp/go/src/github.com/dgraph-io/dgraph/dgraph/cmd/live/batch.go:396 +0x1af
created by github.com/dgraph-io/dgraph/dgraph/cmd/live.setup
	/tmp/go/src/github.com/dgraph-io/dgraph/dgraph/cmd/live/run.go:361 +0x2f0
, exit status 2

Hey, can you give a small sample that I could reproduce it?

PS. This was confirmed by the user dataset and schema. We are analyzing it internally the fix for next beta release.

@MichelDiz told me it’s a known and fixed bug, but not on this branch yet. An alternative is using bulk import, until next version.

I have the same issue with this client loading a bulk set (separate json files) using live, and then reloading it again using the same cli command pointing to the xidmap created by the initial run. Running server 1.2.2 (21cc8936)

The fix is on master and it will be cherry picked for all latest versions (v20.x.x and v1.x.x).