Subject: [Boost-bugs] [Boost C++ Libraries] #12169: error when copying blocks into a dynamic_bitset with size() not an integral number of bits_per_block
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2016-04-29 14:25:57
#12169: error when copying blocks into a dynamic_bitset with size() not an integral
number of bits_per_block
-------------------------------------+----------------------------
Reporter: Diab Jerius <djerius@â¦> | Owner: jsiek
Type: Bugs | Status: new
Milestone: To Be Determined | Component: dynamic_bitset
Version: Boost 1.61.0 | Severity: Problem
Keywords: |
-------------------------------------+----------------------------
Hi,
I'm trying to initialize a dynamic_bitset<unsigned char> from a vector of
blocks. Here's the code:
{{{
#include <cstdlib>
#include <vector>
#include <boost/dynamic_bitset.hpp>
typedef boost::dynamic_bitset<unsigned char> BitSet;
typedef std::vector<BitSet::block_type> Block;
int main(int argc, char* argv[]) {
int nbits = atoi( argv[1] );
BitSet bits( nbits );
Block buffer;
buffer.resize( bits.num_blocks(), 0xff );
boost::from_block_range(buffer.begin(),buffer.end(), bits );
return 0;
}
}}}
If the bitset size isn't a multiple of sizeof(unsigned char) (here 8), an
assert() in ~dynamic_bitset() fails and the process is aborted.
For example:
{{{
% ./a.out 1
a.out: boost-1.60.0/include/boost/dynamic_bitset/dynamic_bitset.hpp:633:
ost::dynamic_bitset<Block, Allocator>::~dynamic_bitset() [with Block =
unsigned char; Allocator = std::allocator<unsigned ar>]: Assertion
`m_check_invariants()' failed.
Aborted
% ./a.out 8
% ./a.out 15
a.out: boost-1.60.0/boost/dynamic_bitset/dynamic_bitset.hpp:633:
ost::dynamic_bitset<Block, Allocator>::~dynamic_bitset() [with Block =
unsigned char; Allocator = std::allocator<unsigned ar>]: Assertion
`m_check_invariants()' failed.
Aborted
% ./a.out 16
%
}}}
I see this with 1.59 & 1.60 using either g++ 4.7.2 or Apple LLVM
version 6.0 (clang-600.0.57) (based on LLVM 3.5svn)
Thanks,
Diab
-- Ticket URL: <https://svn.boost.org/trac/boost/ticket/12169> Boost C++ Libraries <http://www.boost.org/> Boost provides free peer-reviewed portable C++ source libraries.
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