grpc-go metadata example hangs when running though grpc-dump

[shinderuk]

Run the metadata example through grpc-dump and observe that client hangs.

1. Start the server

$ go run ./server
server listening at [::]:50051

2. Start grpc-dump

$ ~/go/bin/grpc-dump -port 8980 -destination localhost:50051
INFO[0000] Listening on 127.0.0.1:8980                  
INFO[0000] Not intercepting TLS connections

3. Run the client through proxy

$ go run ./client --addr localhost:8980
--- unary ---
timestamp from header:
 0. Apr  1 10:05:11.029726000
location from header:
 0. MTV
response:
 - this is examples/metadata
timestamp from trailer:
 0. Apr  1 10:05:11.029891000
--- server streaming ---
timestamp from header:
 0. Apr  1 10:05:12.033684000
location from header:
 0. MTV
response:
 - this is examples/metadata
 - this is examples/metadata
 - this is examples/metadata
 - this is examples/metadata
 - this is examples/metadata
 - this is examples/metadata
 - this is examples/metadata
 - this is examples/metadata
 - this is examples/metadata
 - this is examples/metadata
timestamp from trailer:
 0. Apr  1 10:05:12.033878000
--- client streaming ---

The client hangs.

I don't know if it's related to passing metadata or a more general problem with client streaming.