[Bug]: Possible issue with Nil data or Channel in Fan-Out

[Benji Vesterby]

🐞 Describe the bug

Panic occurred in Stream possibly due to nil channel or nil data on channel when using fan-out

panic: reflect.Select: SendDir case missing Send value

goroutine 817 [running]:
reflect.Select({0xc0002aca80?, 0x2, 0x0?})
        /usr/local/go/src/reflect/value.go:2922 +0x6f2
go.atomizer.io/stream.FanOut[...]({0x55f8d88, 0xc009086000?}, 0xc009088120?, {0xc009090000, 0x1, 0x2})

📚 To Reproduce

💡 Expected behavior

Should not panic on nil channel or nil data

⚙️ Environment

• Release Version: v1.0.7
• OS: Linux
• Architecture: x86_64
• Go Version: 1.19

[Craig Cogdill]

I encountered this panic when I attempted to send nil on a channel that was part of a FanOut

[Benji Vesterby]

I haven't been able to reproduce this since