[Varnish] #1742: varnishlog -B produces a file varnishlog -r cannot read

[Varnish]

#1742: varnishlog -B produces a file varnishlog -r cannot read
---------------------+------------------------
 Reporter:  Dridi    |       Type:  defect
   Status:  new      |   Priority:  normal
Milestone:           |  Component:  varnishlog
  Version:  4.0.3    |   Severity:  normal
 Keywords:  vsl vsm  |
---------------------+------------------------
 I may use it wrongly, but I use varnishlog -N as a workaround.

 {{{
 varnishtest "varnishlog -r cannot read a file produced by varnishlog -B"

 varnish v1 -arg "-b ${bad_ip}:80" -start

 shell "${varnishlog} -n ${tmpdir}/v1 -d -B >${tmpdir}/output.vsl"
 shell "${varnishlog} -r ${tmpdir}/output.vsl"
 }}}

 The error message:
 {{{
 Can't open log (VSL file read error: EOF
 )
 }}}

 As a side note:
 How about a {{{ ${v1_n_arg} }}} macro in varnishtest?

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Ticket URL: <https://www.varnish-cache.org/trac/ticket/1742>
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