Specifying a non-existent job version causes SEGV in nomad CLI

[Jeff-Hanson]

If you have a question, prepend your issue with [question] or preferably use the nomad mailing list.

If filing a bug please include the following:

Nomad version

Output from nomad version
09:36 $ nomad version
Nomad v0.8.4

Operating system and Environment details

OSX 10.12.6

Issue

When running 'nomad job history -full -version bad-version job-name' using the CLI I get:
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x100 pc=0x50d59a5]

goroutine 1 [running]:
github.com/hashicorp/nomad/command.(*JobHistoryCommand).formatJobVersion(0xc420514790, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0)
/private/tmp/nomad-20180611-50613-t48b0m/nomad-0.8.4/src/github.com/hashicorp/nomad/command/job_history.go:252 +0x45
github.com/hashicorp/nomad/command.(*JobHistoryCommand).Run(0xc420514790, 0xc4200f0030, 0x4, 0x4, 0xc4202b6b40)
/private/tmp/nomad-20180611-50613-t48b0m/nomad-0.8.4/src/github.com/hashicorp/nomad/command/job_history.go:185 +0xc1d
github.com/hashicorp/nomad/vendor/github.com/mitchellh/cli.(*CLI).Run(0xc42012d2c0, 0xc42012d2c0, 0xc420511ca0, 0xc)
/private/tmp/nomad-20180611-50613-t48b0m/nomad-0.8.4/src/github.com/hashicorp/nomad/vendor/github.com/mitchellh/cli/cli.go:255 +0x1eb
main.RunCustom(0xc4200f0010, 0x6, 0x6, 0xc4204e9f68)
/private/tmp/nomad-20180611-50613-t48b0m/nomad-0.8.4/src/github.com/hashicorp/nomad/main.go:127 +0x4b4
main.Run(0xc4200f0010, 0x6, 0x6, 0xc4200c6058)
/private/tmp/nomad-20180611-50613-t48b0m/nomad-0.8.4/src/github.com/hashicorp/nomad/main.go:72 +0x3f
main.main()
/private/tmp/nomad-20180611-50613-t48b0m/nomad-0.8.4/src/github.com/hashicorp/nomad/main.go:68 +0x63

Reproduction steps

Execute 'nomad job history -full -version bad-version job-name' with a job version that doesn't exist.

Nomad Server logs (if appropriate)

NA

Nomad Client logs (if appropriate)

NA

Job file (if appropriate)

NA

[preetapan]

Thanks for the bug report @Jeff-Hanson, was able to repro this. We'll fix this in the upcoming release.

[github-actions]

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