[Varnish] #1249: Undeterministic results in regsub/regsuball

[Varnish]

#1249: Undeterministic results in regsub/regsuball
---------------------+--------------------
 Reporter:  arthens  |       Owner:
     Type:  defect   |      Status:  new
 Priority:  normal   |   Milestone:
Component:  build    |     Version:  3.0.3
 Severity:  normal   |  Resolution:
 Keywords:           |
---------------------+--------------------

Comment (by arthens):

 One other detail is that regsub/regsuball only lose characters appearing
 BEFORE the matched substring.

 If you have the regexp:
 {{{
 (^|; ) *wcsid=[^;]+;? *
 }}}

 and the string
 {{{
 var1=value1; wcsid=wcsid-value; var2=value2
 }}}

 There are 2 possible results:
 {{{
 var1=value1; var2=value2 (when it works correctly)
 }}}

 and
 {{{
 var2=value2 (when it's bugged)
 }}}

 I have NEVER seen it lose:
 - the characters following the match
 - only a subset of the characters preceding the match

-- 
Ticket URL: <https://www.varnish-cache.org/trac/ticket/1249#comment:2>
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