[Bug libstdc++/55047] operator() in std::exponential_distribution may call log(0)

[paolo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55047



--- Comment #4 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> 
2012-11-01 21:09:57 UTC ---

Author: paolo

Date: Thu Nov  1 21:09:51 2012

New Revision: 193070



URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193070

Log:

2012-11-01   Haakan Younes  <hyou...@google.com>

         Paolo Carlini  <paolo.carl...@oracle.com>



    PR libstdc++/55047

    * include/bits/random.h (exponential_distribution<>::operator):

    Fix formula to std::log(result_type(1) - __aurng()).

    * include/bits/random.tcc: Likewise, everywhere.



Modified:

    branches/gcc-4_7-branch/libstdc++-v3/ChangeLog

    branches/gcc-4_7-branch/libstdc++-v3/include/bits/random.h

    branches/gcc-4_7-branch/libstdc++-v3/include/bits/random.tcc