Error when channel isn't available

[v0idpwn]

Describe the bug
Trying to use a closed channel with the gun adapter, I get the following error: {:error, %GRPC.RPCError{status: 2, message: ":down: :normal"}}

To Reproduce
Steps to reproduce the behavior:

• Attempt to use a channel that finished due to a timeout or similar

Expected behavior

• A more specific error, which would allow me to retry. Currently, I'm matching on the error message ":down: :normal", but I'd like to have a different status or a different error instead of %GRPC.RPCError{}, specially considering that maybe the connection process is down for other reason.

Versions:

• OS: Linux
• Erlang: 26.1.2
• Elixir: 1.15.6-otp-26
• mix.lock(grpc, gun, cowboy, cowlib):

grpc: v0.8.1
gun: v2.1.0
cowlib: v2.13.0

Additional context
Add any other context about the problem here.