telegraf crashes in LoadDirectory

[write0nly]

Bug report

System info:

RHEL6 using the rpm below from your download page

# rpm -q telegraf
telegraf-1.2.1-1.x86_64

Steps to reproduce:

1. create /etc/telegraf/telegraf.conf.d with mode 0644
2. start telegraf

Expected behavior:

telegraf to error saying that /etc/telegraf/telegraf.conf.d is not browsable

Actual behavior:

telegraf crashes in config.LoadDirectory

goroutine 1 [running]:
panic(0xf2b720, 0xc4200120a0)
	/usr/local/go/src/runtime/panic.go:500 +0x1a1
github.com/influxdata/telegraf/internal/config.(*Config).LoadDirectory.func1(0xc420015860, 0x23, 0x0, 0x0, 0x18ec040, 0xc4200158c0, 0x0, 0x0)
	/home/ubuntu/telegraf-build/src/github.com/influxdata/telegraf/internal/config/config.go:509 +0x2f
path/filepath.walk(0x7fffc320cddd, 0x18, 0x18fd6a0, 0xc420092270, 0xc42012f630, 0x0, 0xf22d01)
	/usr/local/go/src/path/filepath/path.go:372 +0x22e
path/filepath.Walk(0x7fffc320cddd, 0x18, 0xc42012f630, 0x7000105, 0x0)
	/usr/local/go/src/path/filepath/path.go:398 +0xd5
github.com/influxdata/telegraf/internal/config.(*Config).LoadDirectory(0xc4202c05a0, 0x7fffc320cddd, 0x18, 0x0, 0x0)
	/home/ubuntu/telegraf-build/src/github.com/influxdata/telegraf/internal/config/config.go:522 +0x79
main.reloadLoop(0xc4200881e0, 0x0, 0x0)
	/home/ubuntu/telegraf-build/src/github.com/influxdata/telegraf/cmd/telegraf/telegraf.go:211 +0x732
main.main()
	/home/ubuntu/telegraf-build/src/github.com/influxdata/telegraf/cmd/telegraf/telegraf.go:342 +0x85

[sparrc]

strange that mode 0644 would cause a panic, are there files in the directory that are 0600?

[write0nly]

I had files with mode 0644 inside it. ... Not sure, if you want i can create a more detailed reproducer.