Re: [boost] [block_ptr] Request for a review manager

// do something that allocates from the heap

v.emplace_back( new X );

The last line constructs a block_ptr<X> inside the vector's allocated memory, which is on the heap. So the block_ptr goes looking for a previous heap allocation and finds some random one.

Ah wait, the last allocation is "new X" here. Hmm.