Already logging to gdb.txt.
#0  _dbus_message_iter_check (iter=0x8) at ../../dbus/dbus-message.c:745
        byte_order = <optimized out>
#1  0xb6b37452 in dbus_message_iter_get_arg_type (iter=0x8)
    at ../../dbus/dbus-message.c:2143
        real = 0x8
#2  0xb6f58136 in core::dbus::Message::Reader::Private::ensure_argument_type_or_throw (expected_type=<optimized out>, this=<optimized out>)
    at /build/dbus-cpp-bBVMox/dbus-cpp-5.0.0+16.10.20160809/src/core/dbus/message_p.h:43
        actual_type = 3
#3  core::dbus::Message::Reader::pop_string (this=this@entry=0xbefff290)
    at /build/dbus-cpp-bBVMox/dbus-cpp-5.0.0+16.10.20160809/src/core/dbus/message.cpp:190
No locals.
#4  0x00041dc8 in core::dbus::Codec<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >::decode_argument (arg="", in=...)
    at /usr/include/core/dbus/types/stl/string.h:64
        s = <optimized out>
#5  core::dbus::decode_argument<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > (arg="", out=...)
    at /usr/include/core/dbus/codec.h:353
No locals.
#6  core::dbus::operator>><std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > (out="", reader=...)
    at /usr/include/core/dbus/message_streaming_operators.h:30
No locals.
#7  core::dbus::types::Variant::as<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > (this=<optimized out>, 
    this=<optimized out>) at /usr/include/core/dbus/types/variant.h:142
No locals.
#8  core::dbus::Codec<mediascanner::Filter>::decode_argument (in=..., 
    filter=...)
    at /home/james/src/mediascanner2-ubuntu-yakkety-landing-063/src/ms-dbus/dbus-codec.cc:161
        key = "artist"
        value = {
          _vptr.Variant = 0x5aecc <vtable for core::dbus::types::Variant+8>, 
          encoder = {<std::_Maybe_unary_or_binary_function<void, core::dbus::Message::Writer&>> = {<std::unary_function<core::dbus::Message::Writer&, void>> = {<No data fields>}, <No data fields>}, <std::_Function_base> = {
              static _M_max_size = 8, static _M_max_align = 4, _M_functor = {
                _M_unused = {_M_object = 0x658d0, _M_const_object = 0x658d0, 
                  _M_function_pointer = 0x658d0, 
                  _M_member_pointer = (void (std::_Undefined_class::*)(std::_Undefined_class * const)) 0x658d0, this adjustment 207976}, 
                _M_pod_data = "\320X\006\000\320X\006"}, _M_manager = 0x0}, 
            _M_invoker = 0x658d0}, 
          decoder = {<std::_Maybe_unary_or_binary_function<void, core::dbus::Message::Reader&>> = {<std::unary_function<core::dbus::Message::Reader&, void>> = {<No data fields>}, <No data fields>}, <std::_Function_base> = {
              static _M_max_size = 8, static _M_max_align = 4, _M_functor = {
                _M_unused = {_M_object = 0x65b00, _M_const_object = 0x65b00, 
                  _M_function_pointer = 0x65b00, 
                  _M_member_pointer = (void (std::_Undefined_class::*)(std::_Undefined_class * const)) 0x65b00, this adjustment 206768}, 
                _M_pod_data = "\000[\006\000`O\006"}, 
              _M_manager = 0x42321 <std::_Function_base::_Base_manager<core::dbus::types::Variant::Variant()::{lambda(core::dbus::Message::Reader&)#1}>::_M_manager(std::_Any_data&, std::_Function_base::_Base_manager<core::dbus::types::Variant::Variant()::{lambda(core::dbus::Message::Reader&)#1}> const&, std::_Manager_operation)>}, 
            _M_invoker = 0x42529 <std::_Function_handler<void (core::dbus::Message::Reader&), core::dbus::types::Variant::Variant()::{lambda(core::dbus::Message::Reader&)#1}>::_M_invoke(std::_Any_data const&, core::dbus::Message::Reader&)>}, any = {reader_ = {d = std::shared_ptr (empty) 0x0}}, signature_ = {
            signature = ""}}
        r = {d = std::shared_ptr (count 1, weak 0) 0x65a58}
#9  0x00028364 in core::dbus::decode_argument<mediascanner::Filter> (arg=..., 
    out=...) at /usr/include/core/dbus/codec.h:353
No locals.
#10 core::dbus::operator>><mediascanner::Filter> (out=..., 
    reader=<error reading variable: access outside bounds of object referenced via synthetic pointer>)
    at /usr/include/core/dbus/message_streaming_operators.h:30
No locals.
#11 MediaStoreDBusTests_filter_codec_Test::TestBody (this=0x64d88)
    at /home/james/src/mediascanner2-ubuntu-yakkety-landing-063/test/test_dbus.cc:87
        filter = {p = 0x657a0}
        other = {p = 0x65818}
#12 0x0003f3c2 in testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test, void> (location=0x46178 "the test body", 
    method=&virtual testing::Test::TestBody(), object=0x64d88)
    at /usr/src/gtest/src/gtest.cc:2078
No locals.
#13 testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>
    (object=object@entry=0x64d88, method=&virtual testing::Test::TestBody(), 
    location=location@entry=0x46178 "the test body")
    at /usr/src/gtest/src/gtest.cc:2114
No locals.
#14 0x00039b3c in testing::Test::Run (this=this@entry=0x64d88)
    at /usr/src/gtest/src/gtest.cc:2151
        impl = 0x64908
#15 0x00039c94 in testing::Test::Run (this=0x64d88)
    at /usr/src/gtest/src/gtest.cc:2142
No locals.
#16 testing::TestInfo::Run (this=0x64cf0) at /usr/src/gtest/src/gtest.cc:2326
        impl = 0x64908
        test = 0x64d88
#17 0x00039d96 in testing::TestInfo::Run (this=<optimized out>)
    at /usr/src/gtest/src/gtest.cc:2301
No locals.
#18 testing::TestCase::Run (this=0x64b28) at /usr/src/gtest/src/gtest.cc:2444
        i = 2
        impl = 0x64908
#19 0x0003a0c4 in testing::TestCase::Run (this=<optimized out>)
    at /usr/src/gtest/src/gtest.cc:4353
No locals.
#20 testing::internal::UnitTestImpl::RunAllTests (this=0x64908)
    at /usr/src/gtest/src/gtest.cc:4315
        test_index = 0
        i = 0
        should_shard = <optimized out>
        has_tests_to_run = true
        forever = false
        in_subprocess_for_death_test = <optimized out>
        failed = <optimized out>
        repeat = 1
        this = 0x64908
#21 0x0003a32e in testing::internal::HandleSehExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool> (
    location=0x462e4 "auxiliary test code (environments or event listeners)", 
    method=<optimized out>, object=<optimized out>)
    at /usr/src/gtest/src/gtest.cc:2078
No locals.
#22 testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool> (
    location=0x462e4 "auxiliary test code (environments or event listeners)", 
    method=(bool (testing::internal::UnitTestImpl::*)(testing::internal::UnitTestImpl * const)) 0x39e49 <testing::internal::UnitTestImpl::RunAllTests()>, 
    object=0x64908) at /usr/src/gtest/src/gtest.cc:2114
No locals.
#23 testing::UnitTest::Run (this=<optimized out>)
    at /usr/src/gtest/src/gtest.cc:3926
        in_death_test_child_process = <optimized out>
        premature_exit_file = <optimized out>
#24 0x00026c7c in RUN_ALL_TESTS () at /usr/include/gtest/gtest.h:2288
No locals.
#25 main (argc=<optimized out>, argv=<optimized out>)
    at /home/james/src/mediascanner2-ubuntu-yakkety-landing-063/test/test_dbus.cc:104
No locals.