BP[7.0.2] - Magma GSI index test hit "panic: runtime error: invalid memory address or nil pointer dereference"

The Magma GSI index run failed while creating index. There are 4 kv nodes and 1 indexer node. We load 10B docs with 1 replica. The build used in this run is 7.1.0-1273.

panic: runtime error: invalid memory address or nil pointer dereferencepanic: runtime error: invalid memory address or nil pointer dereference[signal SIGSEGV: segmentation violation code=0x1 addr=0x178 pc=0xfe7f7a]
goroutine 661526 [running]:github.com/couchbase/indexing/secondary/indexer.(*storageMgr).getIndexStorageStats(0xc000619a20, 0x0, 0xc05573b7c8, 0x6c8f11, 0xc00b63c480) /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/indexing/secondary/indexer/storage_manager.go:1603 +0x115agithub.com/couchbase/indexing/secondary/indexer.(*storageMgr).handleGetIndexStorageStats.func1(0xc000619a20, 0x14e4a80, 0xc0068d5c60) /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/indexing/secondary/indexer/storage_manager.go:1377 +0xadcreated by github.com/couchbase/indexing/secondary/indexer.(*storageMgr).handleGetIndexStorageStats /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/indexing/secondary/indexer/storage_manager.go:1370 +0x8aInitializing write barrier = 8000

Logs:

https://s3.amazonaws.com/bugdb/jira/qe/collectinfo-2021-09-23T173144-ns_1%40172.23.97.129.zip
https://s3.amazonaws.com/bugdb/jira/qe/collectinfo-2021-09-23T173144-ns_1%40172.23.97.21.zip
https://s3.amazonaws.com/bugdb/jira/qe/collectinfo-2021-09-23T173144-ns_1%40172.23.97.22.zip
https://s3.amazonaws.com/bugdb/jira/qe/collectinfo-2021-09-23T173144-ns_1%40172.23.97.23.zip
https://s3.amazonaws.com/bugdb/jira/qe/collectinfo-2021-09-23T173144-ns_1%40172.23.97.24.zip