[Boost-bugs] [Boost C++ Libraries] #8133: multiprecision, failed gcd tests (test_cpp_int.cpp)

Subject: [Boost-bugs] [Boost C++ Libraries] #8133: multiprecision, failed gcd tests (test_cpp_int.cpp)
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-02-21 00:08:38

#8133: multiprecision, failed gcd  tests (test_cpp_int.cpp)
--------------------------------------------------+-------------------------
 Reporter:  Stepan Podoskin <stepik-777@…>        |       Owner:  johnmaddock   
     Type:  Bugs                                  |      Status:  new           
Milestone:  To Be Determined                      |   Component:  multiprecision
  Version:  Boost 1.53.0                          |    Severity:  Problem       
 Keywords:                                        |  
--------------------------------------------------+-------------------------
 I modified test_cpp_int.cpp to generate random numbers with a lot of ones
 or zeros.

 I modified '''T generate_random(unsigned bits_wanted)''':
 {{{

    ...
    T val = 0;
    for(unsigned i = 0; i < terms_needed; ++i)
    {
       val *= (gen.max)();
       switch (gen() % 5)
       {
       case 0:
           val += gen();
           break;
       case 1:
           val += 1;
           break;
       case 2:
           val += (gen.max)() - 2;
           break;
       case 3:
           val += (gen.max)() - 1;
           break;
       }
    }
    val %= max_val;
    return (val == 0)? val : 1;
 }

 }}}

 This caused some tests related to gcd computation to fail. Here is output
 (I removed some parts of it with results of operations) -
 http://pastebin.com/iZdmX1bq

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8133>
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