http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53477
--- Comment #17 from Pawel Sikora <pluto at agmk dot net> --- pure gcc 4.9.0 20140106 still fails: Breakpoint 2, main () at pr53477.cpp:15 (gdb) p wordBitsetMap $1 = std::map with 1 elementsTraceback (most recent call last): File "/home/pawels/gcc/4.9/share/gcc-4.9.0/python/libstdcxx/v6/printers.py", line 438, in children rep_type = find_type(self.val.type, '_Rep_type') File "/home/pawels/gcc/4.9/share/gcc-4.9.0/python/libstdcxx/v6/printers.py", line 54, in find_type raise ValueError, "Cannot find type %s::%s" % (str(orig), name) ValueError: Cannot find type const std::map<unsigned int, std::map<unsigned int, std::set<unsigned int, std::__7::less<unsigned int>, std::__7::allocator<unsigned int> >, std: :__7::less<unsigned int>, std::__7::allocator<std::__7::pair<unsigned int const, std::set<unsigned int, std::__7::less<unsigned int>, std::__7::allocator<unsigned int> > > > > , std::__7::less<unsigned int>, std::__7::allocator<std::__7::pair<unsigned int const, std::map<unsigned int, std::set<unsigned int, std::__7::less<unsigned int>, std::__7::al locator<unsigned int> >, std::__7::less<unsigned int>, std::__7::allocator<std::__7::pair<unsigned int const, std::set<unsigned int, std::__7::less<unsigned int>, std::__7::al locator<unsigned int> > > > > > > >::mapped_type::_Rep_type patch propses in comment #10 works for me: Breakpoint 2, main () at pr53477.cpp:15 (gdb) p wordBitsetMap $1 = std::map with 1 elements = { [3] = std::set with 2 elements = { [0] = 1, [1] = 5 } }