Found by debug build
==10190==ERROR: AddressSanitizer: new-delete-type-mismatch on 0x602000084430 in thread T0:
object passed to delete has wrong type:
size of the allocated type: 16 bytes;
size of the deallocated type: 8 bytes.
#0 0x7fe244add512 in operator delete(void*, unsigned long) (/lib64/libasan.so.2+0x9a512)
#1 0x3c674fe in std::default_delete<dht::range_streamer::i_source_filter>::operator()(dht::range_streamer::i_source_filter*)
const /usr/include/c++/5.1.1/bits/unique_ptr.h:76
#2 0x3c60584 in std::unique_ptr<dht::range_streamer::i_source_filter, std::default_delete<dht::range_streamer::i_source_filter> >::~unique_ptr()
/usr/include/c++/5.1.1/bits/unique_ptr.h:236
#3 0x3c7ac22 in void __gnu_cxx::new_allocator<std::unique_ptr<dht::range_streamer::i_source_filter,
std::default_delete<dht::range_streamer::i_source_filter> > >::destroy<std::unique_ptr<dht::range_streamer::i_source_filter,
std::default_delete<dht::range_streamer::i_source_filter> > >(std::unique_ptr<dht::range_streamer::i_source_filter,
std::default_delete<dht::range_streamer::i_source_filter> >*) /usr/include/c++/5.1.1/ext/new_allocator.h:124
...
6aa5bfe59f