Hi Haproxy-Team,

I tried compiling different minor versions of 1.8.x releases and all the minor 
versions are crashing whe trying to use option http-proxy:

Configuration that is causing issue:

listen http_proxy-8888
bind *:9876
mode http
option httplog
http-request set-uri 
option http_proxy

If I don't use option http_proxy things work normally. Following is from the 
core dump:

: #0 0x0000000000454839 in cs_destroy (cs=0x207edd0) at 
704 cs->conn->mux->detach(cs);
Missing separate debuginfos, use: debuginfo-install glibc-2.17-196.el7.x86_64 
keyutils-libs-1.5.8-3.el7.x86_64 krb5-libs-1.15.1-8.el7.x86_64 
libcom_err-1.42.9-10.el7.x 86_64 libselinux-2.5-11.el7.x86_64 
openssl-libs-1.0.2k-8.el7.x86_64 pcre-8.32-17.el7.x86_64 
(gdb) bt
#0 0x0000000000454839 in cs_destroy (cs=0x207edd0) at 
#1 si_release_endpoint (si=0x2083540) at include/proto/stream_interface.h:162
#2 stream_free (s=0x20832e0) at src/stream.c:398
#3 process_stream (t=<optimized out>) at src/stream.c:2513
#4 0x00000000004bc38e in process_runnable_tasks () at src/task.c:229
#5 0x0000000000408d9c in run_poll_loop () at src/haproxy.c:2399
#6 run_thread_poll_loop (data=<optimized out>) at src/haproxy.c:2461
#7 main (argc=<optimized out>, argv=0x7ffe6e2cf2d8) at src/haproxy.c:3065
(gdb) quit

HaProxy Install Details:

HA-Proxy version 1.8.4-1deb90d 2018/02/08
Copyright 2000-2018 Willy Tarreau <wi...@haproxy.org>

Build options :
  TARGET  = linux2628
  CPU     = generic
  CC      = gcc
  CFLAGS  = -O2 -g -fno-strict-aliasing -Wdeclaration-after-statement -fwrapv 

Default settings :
  maxconn = 2000, bufsize = 16384, maxrewrite = 1024, maxpollevents = 200

Built with OpenSSL version : OpenSSL 1.0.1e-fips 11 Feb 2013
Running on OpenSSL version : OpenSSL 1.0.1e-fips 11 Feb 2013
OpenSSL library supports TLS extensions : yes
OpenSSL library supports SNI : yes
OpenSSL library supports : SSLv3 TLSv1.0 TLSv1.1 TLSv1.2
Built with transparent proxy support using: IP_TRANSPARENT IPV6_TRANSPARENT 
Encrypted password support via crypt(3): yes
Built with multi-threading support.
Built with PCRE version : 8.32 2012-11-30
Running on PCRE version : 8.32 2012-11-30
PCRE library supports JIT : no (USE_PCRE_JIT not set)
Built with zlib version : 1.2.7
Running on zlib version : 1.2.7
Compression algorithms supported : identity("identity"), deflate("deflate"), 
raw-deflate("deflate"), gzip("gzip")
Built with network namespace support.

Available polling systems :
      epoll : pref=300,  test result OK
       poll : pref=200,  test result OK
     select : pref=150,  test result OK
Total: 3 (3 usable), will use epoll.

Available filters :
        [SPOE] spoe
        [COMP] compression
        [TRACE] trace

Please let me know what's the root cause this option works fine with 1.7.x 


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