[Varnish] #1734: segfault after vcl.state cold

[Varnish]

#1734: segfault after vcl.state cold
---------------------------------+----------------------
 Reporter:  zaterio@…            |       Type:  defect
   Status:  new                  |   Priority:  normal
Milestone:  Varnish 4.0 release  |  Component:  varnishd
  Version:  trunk                |   Severity:  normal
 Keywords:  vcl state cold warm  |
---------------------------------+----------------------
 When I try to place a VCL in a cold state, varnish segfaults and child
 uptime returns to 0.

 {{{
 #varnishadm vcl.list
 available  auto/cold       0 boot
 available  auto/cold       0 test01
 active     auto/warm     107 test92

 #varnishadm vcl.load test03 /etc/varnish/default.vcl
 VCL compiled.

 #varnishadm vcl.list
 available  auto/cold       0 boot
 available  auto/cold       0 test01
 active     auto/warm     161 test92
 available  auto/warm       0 test03

 #varnishadm vcl.use test03
 VCL 'test03' now active


 #varnishstat -1|grep uptime && varnishadm vcl.state test92 cold
 MAIN.uptime                  345         1.00 Child process uptime
 MGT.uptime                                 904       115.75 Management
 process uptime
 }}}

 And then after 10 segs:

 {{{
 #varnishstat -1
 MAIN.uptime                  2         1.00 Child process uptime
 MGT.uptime                                 910       115.75 Management
 process uptime

 #dmesg|grep varnishd
 varnishd[26270]: segfault at 8 ip 00000000004124ff sp 00007f76ddbda1b0
 error 6 in varnishd (deleted)[400000+8e000]
 }}}

 reproducible

-- 
Ticket URL: <https://www.varnish-cache.org/trac/ticket/1734>
Varnish <https://varnish-cache.org/>
The Varnish HTTP Accelerator