panic: runtime error: invalid memory address or nil pointer dereference on filer.sync

[michagruner]

Describe the bug

mgruner@debianbackup:~$ ./weed filer.sync -a=weed1:8888 -b=debianbackup:8888 -isActivePassive -concurrency=1
I1011 10:57:09.825632 filer_sync.go:242 start sync weed1:8888(251043236) => debianbackup:8888(316868620) from 2022-10-10 15:24:03.14703727 +0200 CEST(1665408243147037270)
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x8 pc=0xcd18ab]

goroutine 73 [running]:
github.com/seaweedfs/seaweedfs/weed/util.(*LimitedConcurrentExecutor).Execute(0x0, 0xc0001446e0)
	/github/workspace/weed/util/limited_executor.go:32 +0x2b
github.com/seaweedfs/seaweedfs/weed/replication/sink/filersink.(*FilerSink).replicateChunks(0xc000532320, {0xc0005b9a70, 0x1, 0x0?}, {0xc0007aa5a0, 0x8e})
	/github/workspace/weed/replication/sink/filersink/fetch_write.go:28 +0xe5
github.com/seaweedfs/seaweedfs/weed/replication/sink/filersink.(*FilerSink).CreateEntry.func1({0x3603610, 0xc00081db40})
	/github/workspace/weed/replication/sink/filersink/filer_sink.go:123 +0x225
github.com/seaweedfs/seaweedfs/weed/replication/sink/filersink.(*FilerSink).WithFilerClient.func1(0xc000b5c700)
	/github/workspace/weed/replication/sink/filersink/fetch_write.go:117 +0x6f
github.com/seaweedfs/seaweedfs/weed/pb.WithGrpcClient(0x0?, 0xc000b62b28, {0xc000b721b0, 0x12}, 0x8f?, {0xc000b62b18?, 0x35ad9d4?, 0x2?})
	/github/workspace/weed/pb/grpc_client_server.go:128 +0x2fb
github.com/seaweedfs/seaweedfs/weed/replication/sink/filersink.(*FilerSink).WithFilerClient(0x455e08?, 0xd4?, 0x1?)
	/github/workspace/weed/replication/sink/filersink/fetch_write.go:115 +0x67
github.com/seaweedfs/seaweedfs/weed/replication/sink/filersink.(*FilerSink).CreateEntry(0x35f2f18?, {0xc0007aa5a0?, 0xc00084ccb0?}, 0x35ad9d4?, {0xc0004ccca0?, 0xc0007aa3f0?, 0x8e?})
	/github/workspace/weed/replication/sink/filersink/filer_sink.go:106 +0x74
github.com/seaweedfs/seaweedfs/weed/command.genProcessFunction.func1(0xc000aeeaa0)
	/github/workspace/weed/command/filer_sync.go:400 +0x729
github.com/seaweedfs/seaweedfs/weed/command.doSubscribeFilerMetaChanges.func1(0x0?)
	/github/workspace/weed/command/filer_sync.go:261 +0x123
github.com/seaweedfs/seaweedfs/weed/command.(*MetadataProcessor).AddSyncJob.func1.1()
	/github/workspace/weed/command/filer_sync_jobs.go:45 +0x25
github.com/seaweedfs/seaweedfs/weed/util.Retry({0x2eef13a, 0x12}, 0xc00054ff30)
	/github/workspace/weed/util/retry.go:16 +0xb1
github.com/seaweedfs/seaweedfs/weed/command.(*MetadataProcessor).AddSyncJob.func1()
	/github/workspace/weed/command/filer_sync_jobs.go:44 +0x8a
created by github.com/seaweedfs/seaweedfs/weed/command.(*MetadataProcessor).AddSyncJob
	/github/workspace/weed/command/filer_sync_jobs.go:42 +0x24a
mgruner@debianbackup:~$ ./weed version
version 30GB 3.31 0711870f43e6c5eadd3df70f22478e6e9998e5a2 linux amd64
mgruner@debianbackup:~$ 

System Setup

mgruner@debianbackup:~$ uname -a
Linux debianbackup 5.10.0-17-amd64 #1 SMP Debian 5.10.136-1 (2022-08-13) x86_64 GNU/Linux

Expected behavior
filer.sync working