[Boost-bugs] [Boost C++ Libraries] #5572: regression in lagged_fibonacci607

Subject: [Boost-bugs] [Boost C++ Libraries] #5572: regression in lagged_fibonacci607
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-05-27 05:12:55

#5572: regression in lagged_fibonacci607
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 Reporter:  eric_niebler          |       Owner:  no-maintainer
     Type:  Bugs                  |      Status:  new          
Milestone:  Boost 1.47.0          |   Component:  random       
  Version:  Boost Release Branch  |    Severity:  Showstopper  
 Keywords:  lagged_fibonacci607   |  
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 Many accumulators tests are now failing on both trunk and release. I have
 tracked it down to recent changes in Boost.Random. I don't know for how
 long this has been happening.

 The accumulators tests use the lagged_fibonacci607 random number
 generator. The tests work by sending a large amount of random data through
 various statistical accumulators and checking that the results are within
 a certain tolerance of what they would be if the data were actually
 random. In Boost 1.45 and previous versions, this worked. (I haven't
 tested 1.46.) Trunk and release are hosed, leading me to suspect that this
 random number generator is no longer producing sufficiently random data.

 I have verified this by replacing boost/random on trunk with the one from
 1.45. With this change, the accumulators tests pass.

 Steven, this seems like a regression. Can you look into this?

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5572>
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