Fix handling of one error in bidi calls, and one interop server method

src/ruby/lib/grpc/generic/bidi_call.rb

@@ -173,6 +173,14 @@ module GRPC
         finished
       end
       GRPC.logger.debug('bidi-write-loop: finished')
+    rescue GRPC::Core::CallError => e
+      # This is almost definitely caused by a status arriving while still
+      # writing. Don't re-throw the error
+      GRPC.logger.warn('bidi-write-loop: ended with error')
+      GRPC.logger.warn(e)
+      notify_done
+      @writes_complete = true
+      finished
     rescue StandardError => e
       GRPC.logger.warn('bidi-write-loop: failed')
       GRPC.logger.warn(e)

src/ruby/pb/test/server.rb

@@ -188,12 +188,14 @@ class TestTarget < Grpc::Testing::TestService::Service
       begin
         GRPC.logger.info('interop-server: started receiving')
         reqs.each do |req|
-          resp_size = req.response_parameters[0].size
+          req.response_parameters.each do |params|
+            resp_size = params.size
             GRPC.logger.info("read a req, response size is #{resp_size}")
             resp = cls.new(payload: Payload.new(type: req.response_type,
                                                 body: nulls(resp_size)))
             q.push(resp)
           end
+        end
         GRPC.logger.info('interop-server: finished receiving')
         q.push(self)
       rescue StandardError => e