Hi,

Valgrind reports multiple problems in our project which seem to come from boost::range::any_range. I was able to produce a small example which reproduces the problem:
#include <iostream>

#include <boost/range.hpp>
#include <boost/range/any_range.hpp>
#include <boost/range/adaptors.hpp>

struct Int
{
    Int(int i): x(i) {}
    int x;
};

int main( int argc, char* argv[] )
{
    typedef boost::any_range<Int*,
                             boost::forward_traversal_tag,
                             Int*,
                             std::ptrdiff_t> R;

    std::vector<std::unique_ptr<Int>> v;
    v.push_back( std::make_unique<Int>(42) );

    auto f = [](std::unique_ptr<Int> const& p) {return p.get();};
    R r = v | boost::adaptors::transformed(f);

    auto x = (*boost::begin(r))->x;
    std::cout << x << std::endl;
    return 0;
}

Running this, valgrind reports a "Use of uninitialized value of size 8":
# g++ --version
g++ (GCC) 5.2.0

# g++ -std=c++1y -o test test.cpp

# valgrind --version
valgrind-3.11.0

# valgrind --track-origins=yes ./test
==8119== Memcheck, a memory error detector
==8119== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al.
==8119== Using Valgrind-3.11.0 and LibVEX; rerun with -h for copyright info
==8119== Command: ./test
==8119==
==8119== Use of uninitialised value of size 8
==8119==    at 0x4010B8: main (in /tmp/test)
==8119== Uninitialised value was created by a stack allocation
==8119==    at 0x40315D: boost::range_detail::any_iterator<Int*, boost::iterators::forward_traversal_tag, Int*, long, boost::any_iterator_buffer<64ul> >::dereference() const (in /tmp/test)
==8119==
42
==8119==
==8119== HEAP SUMMARY:
==8119==     in use at exit: 72,704 bytes in 1 blocks
==8119==   total heap usage: 3 allocs, 2 frees, 72,716 bytes allocated
==8119==
==8119== LEAK SUMMARY:
==8119==    definitely lost: 0 bytes in 0 blocks
==8119==    indirectly lost: 0 bytes in 0 blocks
==8119==      possibly lost: 0 bytes in 0 blocks
==8119==    still reachable: 72,704 bytes in 1 blocks
==8119==         suppressed: 0 bytes in 0 blocks
==8119== Rerun with --leak-check=full to see details of leaked memory
==8119==
==8119== For counts of detected and suppressed errors, rerun with: -v
==8119== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 1 from 1)

Best wishes,
Jens

Jens Auer | CGI | Software-Engineer

CGI (Germany) GmbH & Co. KG
Rheinstraße 95 | 64295 Darmstadt | Germany

T: +49 6151 36860 154
jens.auer@cgi.com
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Jens Auer | CGI | Software-Engineer

CGI (Germany) GmbH & Co. KG
Rheinstraße 95 | 64295 Darmstadt | Germany

T: +49 6151 36860 154
jens.auer@cgi.com
Unsere Pflichtangaben gemäß § 35a GmbHG / §§ 161, 125a HGB finden Sie unter de.cgi.com/pflichtangaben.