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fixup e0b5bd7: crash on endpoint.ListStale if replication-cursor-v1 bookmark present

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```
cs@cstp:[~/zrepl/zrepl]: artifacts/zrepl-linux-amd64 zfs-abstraction release-stale --dry-run
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x9de971]

goroutine 1 [running]:
github.com/zrepl/zrepl/endpoint.listStaleFiltering(0xc00012b700, 0x5, 0x8, 0x0, 0x13ccb58)
        /endpoint/endpoint_zfs_abstraction.go:736 +0x281
github.com/zrepl/zrepl/endpoint.ListStale(0xe3ae20, 0xc00026b740, 0x0, 0xe27c60, 0x13ccb58, 0xc0001d8690, 0x0, 0x0, 0x0, 0x1, ...)
        /endpoint/endpoint_zfs_abstraction.go:698 +0x3fd
github.com/zrepl/zrepl/client.doZabsReleaseStale(0xe3ae20, 0xc00026b740, 0x13a28a0, 0xc000151be0, 0x0, 0x1, 0x5705b4, 0xc0002686e0)
        /client/zfsabstractions_release.go:83 +0x1a0
github.com/zrepl/zrepl/cli.(*Subcommand).run(0x13a28a0, 0xc000264c80, 0xc000151be0, 0x0, 0x1)
        /cli/cli.go:104 +0xf5
github.com/spf13/cobra.(*Command).execute(0xc000264c80, 0xc000151bd0, 0x1, 0x1, 0xc000264c80, 0xc000151bd0)
        GOROOT/pkg/mod/github.com/spf13/cobra@v0.0.2/command.go:760 +0x2aa
github.com/spf13/cobra.(*Command).ExecuteC(0x13a43c0, 0x0, 0x0, 0x0)
        GOROOT/pkg/mod/github.com/spf13/cobra@v0.0.2/command.go:846 +0x2ea
github.com/spf13/cobra.(*Command).Execute(...)
        GOROOT/pkg/mod/github.com/spf13/cobra@v0.0.2/command.go:794
github.com/zrepl/zrepl/cli.Run()
        /cli/cli.go:151 +0x2d
main.main()
        /main.go:24 +0x20
```
This commit is contained in:
Christian Schwarz 2020-05-01 23:38:52 +02:00
parent 7b34d6cba5
commit 6f441c55dc
1 changed files with 3 additions and 0 deletions
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3
endpoint/endpoint_zfs_abstraction.go
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@ -731,6 +731,9 @@ func listStaleFiltering(abs []Abstraction, sinceBound *CreateTXGRangeBound) *Sta
}
stepFirstNotStaleCandidates := make(map[fsAndJobId]stepFirstNotStaleCandidate) // empty map => will always return nil
for _, a := range abs {
if a.GetJobID() == nil {
continue // already put those into always-live list noJobId in above loop
}
key := fsAndJobId{a.GetFS(), *a.GetJobID()}
c := stepFirstNotStaleCandidates[key]