[Boost-bugs] [Boost C++ Libraries] #8491: boost::random::discrete_distribution ignores the first element

Subject: [Boost-bugs] [Boost C++ Libraries] #8491: boost::random::discrete_distribution ignores the first element
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-04-25 07:20:03

#8491: boost::random::discrete_distribution ignores the first element
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 Reporter:  astralstorm@…          |       Owner:  no-maintainer
     Type:  Bugs                   |      Status:  new          
Milestone:  To Be Determined       |   Component:  random       
  Version:  Boost 1.53.0           |    Severity:  Showstopper  
 Keywords:                         |  
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 It seems that discrete_distribution can set the first item weight to 0,
 which should not be possible.

 Categorical distribution like this must use all supplied items - of course
 you use actual weight 0 as a marker of "can't happen", which should be
 documented.

 The attached testcase demonstrates the problem. (As well as shows another
 one that discrete_distribution can't handle negative weights properly.)

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/8491>
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