求助，std::map和std::string 引发的coredump，不知道啥原因

redboy333

有段程序跑了大概2小时coredump了。
程序里是用了这样的结构 std::map<std::string,std::string> m_testmap
在一个函数中做了拷贝 m_testmap = testmap

看堆栈是

(gdb) bt #0  0xffffe410 in __kernel_vsyscall () #1  0xf5fb0a30 in raise () from /lib/libc.so.6 #2  0xf5fb2153 in abort () from /lib/libc.so.6 #3  0xf5fe608b in __libc_message () from /lib/libc.so.6 #4  0xf5feba51 in malloc_printerr () from /lib/libc.so.6 #5  0xf5fed224 in free () from /lib/libc.so.6 #6  0xf61ab2b1 in operator delete () from /usr/lib/libstdc++.so.6 #7  0xf618816d in std::string::_Rep::_M_destroy () from /usr/lib/libstdc++.so.6 #8  0xf618acf7 in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string ()    from /usr/lib/libstdc++.so.6 #9  0xf774972a in ~pair (this=0x9f956f2 at /usr/include/c++/4.1.2/bits/stl_pair.h:69 #10 0xf7749775 in __gnu_cxx::new_allocator<std::pair<std::string const, std::string> >::destroy (this=0xad2daf7f, __p=0x9f956f2     at /usr/include/c++/4.1.2/ext/new_allocator.h:107 #11 0xf7749871 in std::_Rb_tree<std::string, std::pair<std::string const, std::string>, std::_Select1st<std::pair<std::string const, std::string> >, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > >::destroy_node (     this=0x81da43c, __p=0x9f956f1 at /usr/include/c++/4.1.2/bits/stl_tree.h:391 #12 0xf7749904 in std::_Rb_tree<std::string, std::pair<std::string const, std::string>, std::_Select1st<std::pair<std::string const, std::string> >, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > >::_M_erase (     this=0x81da43c, __x=0x9f956f1 at /usr/include/c++/4.1.2/bits/stl_tree.h:1266 #13 0xf77499d3 in std::_Rb_tree<std::string, std::pair<std::string const, std::string>, std::_Select1st<std::pair<std::string const, std::string> >, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > >::clear (this=0x81da43c)     at /usr/include/c++/4.1.2/bits/stl_tree.h:692 #14 0xf6b34783 in std::_Rb_tree<std::string, std::pair<std::string const, std::string>, std::_Select1st<std::pair<std::string const, std::string> >, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > >:perator= (     this=0x81da43c, __x=@0xad2db0a at /usr/include/c++/4.1.2/bits/stl_tree.h:796 #15 0xf6b34858 in std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > >:perator= (this=0x81da43c, __x=@0xad2db0a at /usr/include/c++/4.1.2/bits/stl_map.h:227 #16 0xf6b3205a in CmapInfo::setMap (this=0x81d9688, TokenCodeMap=@0xad2db0a

而此时拷贝过去的map的值是

(gdb) pmap tmpMap 'std::basic_string<char, std::char_traits<char>, std::allocator<char> >' 'std::basic_string<char, std::char_traits<char>, std::allocator<char> >' elem[0].left: $3 = {   static npos = 4294967295,   _M_dataplus = {     <std::allocator<char>> = {       <__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>},     members of std::basic_string<char,std::char_traits<char>,std::allocator<char> >::_Alloc_hider:     _M_p = 0x98f74484 "source1"   } } elem[0].right: $4 = {   static npos = 4294967295,   _M_dataplus = {     <std::allocator<char>> = {       <__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>},     members of std::basic_string<char,std::char_traits<char>,std::allocator<char> >::_Alloc_hider:     _M_p = 0xf61db5dc ""   } } Map size = 1

想问问各位到底是啥原因？这里的map难道不能这样map<"xxxx","">？这里是空字符串，又不是NULL。搞不懂了？