接收client消息crash问题

[adzhang]

Program terminated with signal 11, Segmentation fault.
#0 0x0000000000413f26 in propagatemark ()

Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.149.el6_6.5.x86_64
(gdb) bt
#0 0x0000000000413f26 in propagatemark ()
#1 0x00000000004148a8 in singlestep ()
#2 0x0000000000414f10 in luaC_step ()
#3 0x000000000041d612 in luaV_execute ()
#4 0x00000000004124f0 in unroll ()
#5 0x0000000000411b7b in luaD_rawrunprotected ()
#6 0x0000000000411dd8 in lua_resume ()
#7 0x0000000000425cf7 in auxresume ()
#8 0x0000000000425fd7 in luaB_coresume ()
#9 0x0000000000412768 in luaD_precall ()
#10 0x000000000041d1b6 in luaV_execute ()
#11 0x0000000000412a5c in luaD_call ()
#12 0x0000000000411b7b in luaD_rawrunprotected ()
#13 0x0000000000411bff in luaD_pcall ()
#14 0x000000000040f802 in lua_pcallk ()
#15 0x0000000000424e00 in luaB_pcall ()
#16 0x0000000000412768 in luaD_precall ()
#17 0x000000000041d1b6 in luaV_execute ()
#18 0x0000000000412a5c in luaD_call ()
#19 0x0000000000411b7b in luaD_rawrunprotected ()
#20 0x0000000000411bff in luaD_pcall ()
#21 0x000000000040f802 in lua_pcallk ()
#22 0x00007f35e99ef923 in _cb (context=0x7f35e8c4e080, ud=0x7f35f1762788, type=3, session=0, source=16777241, msg=0x7f35f15d6530, sz=11)

at lualib-src/lua-skynet.c:50

#23 0x0000000000408d30 in dispatch_message (ctx=0x7f35e8c4e080, msg=0x7f35eebf9df0) at skynet-src/skynet_server.c:254
#24 0x0000000000408fbf in skynet_context_message_dispatch (sm=0x7f35f140e160, q=0x7f35f1645300, weight=-1) at skynet-src/skynet_server.c:308
#25 0x0000000000409c81 in _worker (p=) at skynet-src/skynet_start.c:128
#26 0x00007f35f29419d1 in start_thread () from /lib64/libpthread.so.0
#27 0x00007f35f1ffe8fd in clone () from /lib64/libc.so.6

用gdb调试只能跟踪到_cb的函数，拿不准问题出在哪里，我的client往agent服务发json的数据包，当client进入了某个房间，agent会进行skynet.redirect，crash也是随机发生。

[adzhang]

查了老久，原来把agent分发的msg直接send到其他服务里导致crash，通过再次pack的方式解决了。不过对msg的生存期还是比较迷惑，关闭issue先。