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From: Markus Schöpflin (markus.schoepflin_at_[hidden])
Date: 2007-12-04 04:38:20

Boris Gubenko wrote:

> A failure of dynamic_bitset library test dyn_bitset_unit_tests3
> on Tru64/cxx and HP-UX/aCC revealed what appears to be a bug in
> <boost/dynamic_bitset/dynamic_bitset.hpp> introduced after
> Boost 1.34.

[Snip long and detailed analysis.]

> Replacing
> result |= (m_bits[i] << (bits_per_block * i));
> with
> unsigned long piece = m_bits[i];
> result |= (piece << (bits_per_block * i));
> on the trunk makes the test succeed: verified on Tru64/cxx and on
> HP-UX/aCC.


> To fix the problem, I suggest to replace the buggy code in
> <boost/dynamic_bitset/dynamic_bitset.hpp> in the trunk with that
> in 1.34. If there are no objections, I can do it.

I don't think that any of the authors of dynamic_bitset is still around, so
there probably won't be any objections. I for one would welcome the fix.


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