https://luci-logdog.appspot.com/v/?s=infra-internal%2Fbb%2Finternal.infra.cron%2Falerts-dispatcher-staging%2F20174%2F%2B%2Frecipes%2Fsteps%2Frun_alerts_dispatcher%2F0%2Fstdout



[I2016-12-09T08:27:06.911398-08:00 19239 0 dispatcher.go:295] expvars listening on 127.0.0.1:47654
panic: interface conversion: interface is nil, not client.readerType

goroutine 53 [running]:
panic(0x8af0a0, 0xc42025a1c0)
	/tmp/_chrome_infra_build/golang/go/src/runtime/panic.go:500 +0x1a1
infra/monitoring/client.getReader(0x7f9b22cee000, 0xc420191080, 0x0, 0x0)
	/tmp/_chrome_infra_build/infra/go/src/infra/monitoring/client/client.go:50 +0xcb
infra/monitoring/client.BuildExtract(0x7f9b22cee000, 0xc420191080, 0xc420294200, 0x0, 0x0, 0x0)
	/tmp/_chrome_infra_build/infra/go/src/infra/monitoring/client/client.go:119 +0x39
main.fetchBuildExtracts.func1(0xc420294200, 0x7f9b22cee000, 0xc420191080, 0xc42025c360)
	/tmp/_chrome_infra_build/infra/go/src/infra/monitoring/dispatcher/dispatcher.go:143 +0x5c
created by main.fetchBuildExtracts
	/tmp/_chrome_infra_build/infra/go/src/infra/monitoring/dispatcher/dispatcher.go:148 +0x1a7
step returned non-zero exit code: 2

Sean, looks like it's related to your context refactors.