Server locks up a 9fans.net/plan9/client

[mbucc]

• Plan9 client set's a tag for every request
• go9p/p/Srv flushes all current requests when it get's a Tversion (https://github.com/lionkov/go9p/blob/3f7edd396dcf5ef689ef1e586aa37db288852401/p/srv/fcall.go#L30-L43)
• since request is flushed it is not put on the Reqout channel (https://github.com/lionkov/go9p/blob/3f7edd396dcf5ef689ef1e586aa37db288852401/p/srv/srv.go#L449-L451)
• the client hangs waiting for a response.

To reproduce:

go get github.com/mbucc/vufs
cd src/github.com/mbucc/vufs
git checkout e6f6c31480ee51d5fddce59eb5e93216d325c9fe
go test -run TestLock

[mbucc]

This is a bug in 9fans.net/plan9/client, not this server. The client is sending a tag of 1.

"The tag should be NOTAG (value (ushort)~0) for a version message." (http://plan9.bell-labs.com/magic/man2html/5/version)

Closing.