ashley@copac1 ~/tmp $ env LD_LIBRARY_PATH=~/src/boost_1_51_0/stage/lib:/copac/lib gdb regex
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Reading symbols from /export/home/ashley/tmp/regex...done.
(gdb) run
Starting program: /export/home/ashley/tmp/regex 
[Thread debugging using libthread_db enabled]
[New Thread 1 (LWP 1)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
0xff1c71f8 in boost::re_detail::basic_regex_creator<int, boost::icu_regex_traits>::append_set (this=0xffbff738, char_set=...)
    at ./boost/regex/v4/basic_regex_creator.hpp:379
379        result->cclasses = char_set.classes();
(gdb) bt
#0  0xff1c71f8 in boost::re_detail::basic_regex_creator<int, boost::icu_regex_traits>::append_set (this=0xffbff738, char_set=...)
    at ./boost/regex/v4/basic_regex_creator.hpp:379
#1  0xff1be6cc in boost::re_detail::basic_regex_creator<int, boost::icu_regex_traits>::append_set (this=0xffbff738, char_set=...)
    at ./boost/regex/v4/basic_regex_creator.hpp:361
#2  0xff1b085c in boost::re_detail::basic_regex_parser<int, boost::icu_regex_traits>::parse_set (this=0xffbff738)
    at ./boost/regex/v4/basic_regex_parser.hpp:1269
#3  0xff1a7c44 in boost::re_detail::basic_regex_parser<int, boost::icu_regex_traits>::parse_extended (this=0xffbff738)
    at ./boost/regex/v4/basic_regex_parser.hpp:354
#4  0xff1a8600 in boost::re_detail::basic_regex_parser<int, boost::icu_regex_traits>::parse_all (this=0xffbff738)
    at ./boost/regex/v4/basic_regex_parser.hpp:234
#5  0xff1a46e0 in boost::re_detail::basic_regex_parser<int, boost::icu_regex_traits>::parse (this=0xffbff738, p1=0x27cd0, p2=0x27d00, 
    l_flags=0) at ./boost/regex/v4/basic_regex_parser.hpp:157
#6  0xff1a172c in boost::re_detail::basic_regex_implementation<int, boost::icu_regex_traits>::assign (this=0x27d08, arg_first=0x27cd0, 
    arg_last=0x27d00, f=0) at ./boost/regex/v4/basic_regex.hpp:215
#7  0xff19ea64 in boost::basic_regex<int, boost::icu_regex_traits>::do_assign (this=0xffbffa80, p1=0x27cd0, p2=0x27d00, f=0)
    at ./boost/regex/v4/basic_regex.hpp:661
#8  0x00015e9c in boost::basic_regex<int, boost::icu_regex_traits>::assign (this=0xffbffa80, p1=0x27cd0, p2=0x27d00, f=0)
    at /export/home/ashley/src/boost_1_51_0/boost/regex/v4/basic_regex.hpp:382
#9  0x00015880 in boost::basic_regex<int, boost::icu_regex_traits>::basic_regex<boost::u8_to_u32_iterator<char const*, int> > (
    this=0xffbffa80, arg_first=..., arg_last=..., f=0) at /export/home/ashley/src/boost_1_51_0/boost/regex/v4/basic_regex.hpp:404
#10 0x00015064 in boost::re_detail::do_make_u32regex<char const*> (i=0x16d68 <error reading variable>, j=0x16d74 "", opt=0)
    at /export/home/ashley/src/boost_1_51_0/boost/regex/icu.hpp:254
#11 0x00014b44 in boost::make_u32regex (p=0x16d68 <error reading variable>, opt=0)
    at /export/home/ashley/src/boost_1_51_0/boost/regex/icu.hpp:351
#12 0x0001446c in main () at regex.cpp:5
(gdb) f 0
#0  0xff1c71f8 in boost::re_detail::basic_regex_creator<int, boost::icu_regex_traits>::append_set (this=0xffbff738, char_set=...)
    at ./boost/regex/v4/basic_regex_creator.hpp:379
379        result->cclasses = char_set.classes();
(gdb) print char_set
$1 = (const boost::re_detail::basic_char_set<int, boost::icu_regex_traits> &) @0xffbff500: {
  m_singles = {<std::_Vector_base<boost::re_detail::digraph<int>, std::allocator<boost::re_detail::digraph<int> > >> = {
      _M_impl = {<std::allocator<boost::re_detail::digraph<int> >> = {<__gnu_cxx::new_allocator<boost::re_detail::digraph<int> >> = {<No data fields>}, <No data fields>}, _M_start = 0x28440, _M_finish = 0x28450, _M_end_of_storage = 0x28450}}, <No data fields>}, 
  m_ranges = {<std::_Vector_base<boost::re_detail::digraph<int>, std::allocator<boost::re_detail::digraph<int> > >> = {
      _M_impl = {<std::allocator<boost::re_detail::digraph<int> >> = {<__gnu_cxx::new_allocator<boost::re_detail::digraph<int> >> = {<No data fields>}, <No data fields>}, _M_start = 0x0, _M_finish = 0x0, _M_end_of_storage = 0x0}}, <No data fields>}, m_negate = false, 
  m_has_digraphs = false, m_classes = 0, m_negated_classes = 0, m_empty = false, 
  m_equivalents = {<std::_Vector_base<boost::re_detail::digraph<int>, std::allocator<boost::re_detail::digraph<int> > >> = {
      _M_impl = {<std::allocator<boost::re_detail::digraph<int> >> = {<__gnu_cxx::new_allocator<boost::re_detail::digraph<int> >> = {<No data fields>}, <No data fields>}, _M_start = 0x0, _M_finish = 0x0, _M_end_of_storage = 0x0}}, <No data fields>}}
(gdb)