id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
1582	func ngx_proxy_protocol_read  encounter an incomplete line	njuzpw@…		"when I read the source code of nginx, i found this in file :http/ngx_http_request.c

if we set proxy_protol like this:
[listen 80 proxy_protocol;], 

and then in func ngx_http_wait_request_handler, we will call 

n = c->recv(c, b->last, size);
....
p = ngx_proxy_protocol_read(c, b->pos, b->last);

to see if this is an legal proxy_protocol message.
 there is condition that if data in b is not an complete line of proxy_protocol message, ngx_proxy_protocol_read will set p to NULL instead of adding rev to event loop, and this will case a failure. 

I'm wondering if is reasonable here to read proxy_protocol message only once for we may get an incomplete line and case an error(I have tried and it failed indeed) 
"	defect	closed	minor		other	1.12.x	invalid	proxy protocol incomplete line		2.6.32-642.6.2.el6.x86_64 #1 SMP Wed Oct 26 06:52:09 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux	"nginx version: nginx/1.10.1
built by clang 7.3.0 (clang-703.0.31)
configure arguments: --with-stream --prefix=output"