Assertion failure when trying to set net.box watcher on Tarantool < 2.10 server #6819
Description
Tarantool version:
- client: 2.10.0-beta2-70-g5adc02f623f8
- server: any version that doesn't have
IPROTO_WATCH; tested on 2.8.2-83-gbba7a2fadd22
Steps to reproduce:
Server:
Tarantool 2.8.2-83-gbba7a2fadd22
type 'help' for interactive help
tarantool> box.cfg{listen = 3301, log_level = 4}
2022-01-31 14:32:25.280 [71292] main/103/interactive C> Tarantool 2.8.2-83-gbba7a2fadd22
2022-01-31 14:32:25.281 [71292] main/103/interactive C> log level 4
---
...
tarantool> 2022-01-31 14:32:44.313 [71292] iproto iproto.cc:1313 E> ER_UNKNOWN_REQUEST_TYPE: Unknown request type 74
Client:
Tarantool 2.10.0-beta2-55-g2b975e499a46
type 'help' for interactive help
tarantool> c = require('net.box').connect(3301)
---
...
tarantool> c:watch('foo', function() end)
---
- net.box.watcher
...
tarantool> tarantool: /home/vlad/src/tarantool/tarantool/src/box/lua/net_box.c:2283: netbox_transport_dispatch_response: Assertion `transport->inprogress_request_count > 0' failed.
Aborted