Assert error in vfp_esi_bytes_gg()

[Pablo Román]

I'm experiencing the same issue described above. It seems to happen only
when certain urls return a 404 error.

Feb 10 21:43:47 nextweb varnishd[17427]: Child (25119) Panic message:
Assert error in vfp_esi_bytes_gg(), cache_esi_fetch.c line 273:#012
 Condition(i >= VGZ_OK) not true.#012thread = (cache-worker)#012ident =
Linux,2.6.24-23-xen,x86_64,-smalloc,-smalloc,-hcritbit,epoll#012Backtrace:#012
 0x42c7a6: /usr/sbin/varnishd [0x42c7a6]#012  0x41b877: /usr/sbin/varnishd
[0x41b877]#012  0x41c278: /usr/sbin/varnishd [0x41c278]#012  0x421a75:
/usr/sbin/varnishd(FetchBody+0x875) [0x421a75]#012  0x4153e8:
/usr/sbin/varnishd [0x4153e8]#012  0x417ab6:
/usr/sbin/varnishd(CNT_Session+0x9f6) [0x417ab6]#012  0x42efb8:
/usr/sbin/varnishd [0x42efb8]#012  0x42e19b: /usr/sbin/varnishd
[0x42e19b]#012  0x7fe6cac2485a: /lib64/libpthread.so.0 [0x7fe6cac2485a]#012
 0x7fe6ca98e22d: /lib64/libc.so.6(clone+0x6d) [0x7fe6ca98e22d]#012sp =
0x7fe6bfa7a008 {#012  fd = 19, id = 19, xid = 184766452,#012  client =
81.0.234.33 38058,#012  step = STP_FETCHBODY,#012  handling = deliver,#012
 err_code = 404, err_reason = (null),#012  restarts = 0, esi_level = 0#012
 flags =  do_esi is_gzip#012  bodystatus = 4#012  ws = 0x7fe6bfa7a080 {
#012    id = "sess",#012    {s,f,r,e} =
{0x7fe6bfa7ac90,+664,(nil),+65536},#012  }


Does anyone have an idea about how to fix it?
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