logparser panic on reference to file in directory with restricted permissions

[e271828-]

2017-06-11T17:46:06Z E! Error in plugin [inputs.logparser]: open /var/log/supervisor/my_listener-stdout.log: permission denied
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x10 pc=0xbd861d]

goroutine 51 [running]:
github.com/influxdata/telegraf/plugins/inputs/logparser.(*LogParserPlugin).receiver(0xc42012a080, 0x0)
	/home/ubuntu/telegraf-build/src/github.com/influxdata/telegraf/plugins/inputs/logparser/logparser.go:181 +0x6d
created by github.com/influxdata/telegraf/plugins/inputs/logparser.(*LogParserPlugin).tailNewfiles
	/home/ubuntu/telegraf-build/src/github.com/influxdata/telegraf/plugins/inputs/logparser/logparser.go:167 +0x416

System info:

Telegraf v1.3.1 (git: release-1.3 f936156)

Amazon Linux

Steps to reproduce:

Add a logparser entry to a file within a directory with chmod 600 and different ownership.