Segment fault when run tty test

[hiiizxf]

When I run doc/code/tty/main.c, the process was terminated due to a segment fault.
In doc/code/tty/main.c， the function "uv_write" is called twice, and req with the same address is used.
And then uv__queue_insert_tail is called twice ，with the same address req->queue, causing some confusion in the stream->write_completed_queue.
It may be necessary to do the deduplication operation before the uv__queue_insert_tail.

• Version: head
• Platform: Linux version 6.2.0-39-generic
• run the test as root

[bnoordhuis]

Pull request welcome. The libuv book was an external contribution and isn't quite at the same level as the reference documentation.

[abidjappie]

I’d like to take a look at this if nobody else has!

[bnoordhuis]

@abidjappie sure, go for it :)

[abidjappie]

@bnoordhuis I fixed it on my branch (v1.x...abidjappie:libuv:docs-tty-segment-fault)
It seems there's already a fix open by the OP, so I guess I shouldn't open a new one.

Let's get it merged? #4322