panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x50 pc=0x1bb6c67]

goroutine 145334082 [running]:
github.com/streamnative/oxia/server.(*leaderController).handleWalSynced(0xc004533b00, {0x2549ec8, 0xc0081e0c00}, 0xc00ce27d80, 0xc00ed2c8c0, 0x754f84, 0x19656309cff, {0x0?, 0x0?}, {0xc00c4397a0, ...})
	/src/oxia/server/leader_controller.go:920 +0x227
github.com/streamnative/oxia/server.(*leaderController).handleWriteStream.func1(0xc0089353b0?, 0x754f84?, {0x0?, 0x0?})
	/src/oxia/server/leader_controller.go:906 +0x72
github.com/streamnative/oxia/server.(*leaderController).appendToWalStreamRequest.func1({0x0?, 0x0?})
	/src/oxia/server/leader_controller.go:984 +0xa2
github.com/streamnative/oxia/server/wal.(*wal).runSync(0xc0066ba000)
	/src/oxia/server/wal/wal_impl.go:387 +0x36c
github.com/streamnative/oxia/common.DoWithLabels.func1({0x2540318?, 0xc00372f680?})
	/src/oxia/common/pprof.go:46 +0x13
runtime/pprof.Do({0x2540350?, 0xc00a8dde50?}, {{0xc00c2168a0?, 0x1e?, 0x711?}}, 0xc001268f30)
	/usr/local/go/src/runtime/pprof/runtime.go:51 +0x8c
github.com/streamnative/oxia/common.DoWithLabels({0x2540350, 0xc00a8dde50}, 0xc00372e9f0, 0xc0073efaa0)
	/src/oxia/common/pprof.go:42 +0x34d
created by github.com/streamnative/oxia/server/wal.newWal in goroutine 145333831
	/src/oxia/server/wal/wal_impl.go:149 +0xa6f