GSI test crash: Log starts at offset 388191500, trying to read 387874798

panic: : fatal: fatal: segCount:3, Log starts at offset 388191500, trying to read 387874798

goroutine 86518 [running]:

github.com/couchbase/plasma.(*Shard).raisePanic(...)

	/Users/rvncerr/couchbase/goproj/src/github.com/couchbase/plasma/shard.go:1277

github.com/couchbase/plasma.(*Plasma).fatalPanic(0xc0014aaa80, {0xc009b4e780, 0x4b})

	/Users/rvncerr/couchbase/goproj/src/github.com/couchbase/plasma/plasma.go:1912 +0x2f6

github.com/couchbase/plasma.(*pageWalker).readPageSegment(0xc0099e5c18)

	/Users/rvncerr/couchbase/goproj/src/github.com/couchbase/plasma/page_walker.go:255 +0x22d

github.com/couchbase/plasma.(*pageWalker).Next(0xc0060bbc18?)

	/Users/rvncerr/couchbase/goproj/src/github.com/couchbase/plasma/page_walker.go:239 +0x392

github.com/couchbase/plasma.(*page).lookup(0xc00c33e980, 0xc0099e5c18, 0x12cb06400, {0x100b6de10, 0xc00aa1ccc0?})

	/Users/rvncerr/couchbase/goproj/src/github.com/couchbase/plasma/page.go:817 +0x9e

github.com/couchbase/plasma.(*page).Lookup(0xc00c33e980, 0x100070d36?)

	/Users/rvncerr/couchbase/goproj/src/github.com/couchbase/plasma/page.go:795 +0x17c

github.com/couchbase/plasma.(*Writer).Lookup(0xc010b57600, 0x10006df9c?)

	/Users/rvncerr/couchbase/goproj/src/github.com/couchbase/plasma/writer.go:183 +0x123

github.com/couchbase/plasma.(*Writer).LookupKV(0xc010b57600, {0xc008d7e940, 0x10, 0x40})

	/Users/rvncerr/couchbase/goproj/src/github.com/couchbase/plasma/mvcc.go:553 +0x245

main.(*WorkerCtx).doUpdate(0xc0003f5e00)

	/Users/rvncerr/couchbase/goproj/src/github.com/couchbase/plasma/tools/gsi/worker.go:112 +0x38f

main.(*WorkerCtx).Run(0xc0003f5e00, 0xc00cbee040?)

	/Users/rvncerr/couchbase/goproj/src/github.com/couchbase/plasma/tools/gsi/worker.go:268 +0x45d

created by main.(*InstanceCtx).StartWorkers

	/Users/rvncerr/couchbase/goproj/src/github.com/couchbase/plasma/tools/gsi/instance.go:302 +0x14a