led get-builder "luci.chromium.ci:Android Release (Nexus 5X)"                                                                                                                    130 ↵
[I 2018-07-19 12:29:54] getting builder definition
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x7dba0e]

goroutine 1 [running]:
main.JobDefinitionFromNewTaskRequest(0xc4201da000, 0x86ae80, 0xc4201da000, 0x0)
        /tmp/_chrome_infra_build/infra/go/src/infra/tools/led/job.go:46 +0xfe
main.(*cmdGetBuilder).grabBuilderDefinition(0xc420202000, 0x974b40, 0xc42001c030, 0x7ffe8a05dadb, 0x10, 0x7ffe8a05daec, 0x1a, 0x0, 0x0, 0x0, ...)
        /tmp/_chrome_infra_build/infra/go/src/infra/tools/led/cmd_get_builder.go:137 +0x574
main.(*cmdGetBuilder).Run(0xc420202000, 0x976060, 0xc4201285a0, 0xc42011a080, 0x1, 0x1, 0xc42011b920, 0xc420122c58)
        /tmp/_chrome_infra_build/infra/go/src/infra/tools/led/cmd_get_builder.go:160 +0x372
github.com/maruel/subcommands.Run(0x976060, 0xc4201285a0, 0x0, 0x2, 0x2, 0x0)
        /tmp/_chrome_infra_build/infra/go/.vendor/src/github.com/maruel/subcommands/subcommands.go:360 +0x4b0
main.main()
        /tmp/_chrome_infra_build/infra/go/src/infra/tools/led/main.go:133 +0x525

Not sure exactly what's happening here, but it looks like a bug.