for循环中删除map中的元素valgrind检测提示error：Invalid read of size 8

 #include  #include 

 valgrind --tool=memcheck --leak-check=full --track-origins=yes ./test # ~/test ==723953== Memcheck, a memory error detector ==723953== Copyright (C) 2002-2012, and GNU GPL'd, by Julian Seward et al. ==723953== Using Valgrind-3.8.1 and LibVEX; rerun with -h for copyright info ==723953== Command: ./test ==723953== ==723953== Invalid read of size 8 ==723953== at 0x3431C69E60: std::_Rb_tree_increment(std::_Rb_tree_node_base*) (tree.cc:60) ==723953== by 0x40131C: std::_Rb_tree_iterator >::operator++() (in /home/thm/test/test) ==723953== by 0x40117C: A::deleteMap() (in /home/thm/test/test) ==723953== by 0x400F4B: main (in /home/thm/test/test) ==723953== Address 0x4c580b8 is 24 bytes inside a block of size 48 free'd ==723953== at 0x4A06016: operator delete(void*) (vg_replace_malloc.c:480) ==723953== by 0x401E23: __gnu_cxx::new_allocator > >::deallocate(std::_Rb_tree_node >*, unsigned long) (in /home/thm/test/test) ==723953== by 0x401C99: std::_Rb_tree, std::_Select1st >, std::less, std::allocator > >::_M_put_node(std::_Rb_tree_node >*) (in /home/thm/test/test) ==723953== by 0x401AA6: std::_Rb_tree, std::_Select1st >, std::less, std::allocator > >::_M_destroy_node(std::_Rb_tree_node >*) (in /home/thm/test/test) ==723953== by 0x401729: std::_Rb_tree, std::_Select1st >, std::less, std::allocator > >::erase(std::_Rb_tree_iterator >) (in /home/thm/test/test) ==723953== by 0x40134C: std::map, std::allocator > >::erase(std::_Rb_tree_iterator >) (in /home/thm/test/test) ==723953== by 0x401170: A::deleteMap() (in /home/thm/test/test) ==723953== by 0x400F4B: main (in /home/thm/test/test) ==723953== ==723953== Invalid read of size 8 ==723953== at 0x3431C69E80: std::_Rb_tree_increment(std::_Rb_tree_node_base*) (tree.cc:68) ==723953== by 0x40131C: std::_Rb_tree_iterator >::operator++() (in /home/thm/test/test) ==723953== by 0x40117C: A::deleteMap() (in /home/thm/test/test) ==723953== by 0x400F4B: main (in /home/thm/test/test) ==723953== Address 0x4c580a8 is 8 bytes inside a block of size 48 free'd ==723953== at 0x4A06016: operator delete(void*) (vg_replace_malloc.c:480) ==723953== by 0x401E23: __gnu_cxx::new_allocator > >::deallocate(std::_Rb_tree_node >*, unsigned long) (in /home/thm/test/test) ==723953== by 0x401C99: std::_Rb_tree, std::_Select1st >, std::less, std::allocator > >::_M_put_node(std::_Rb_tree_node >*) (in /home/thm/test/test) ==723953== by 0x401AA6: std::_Rb_tree, std::_Select1st >, std::less, std::allocator > >::_M_destroy_node(std::_Rb_tree_node >*) (in /home/thm/test/test) ==723953== by 0x401729: std::_Rb_tree, std::_Select1st >, std::less, std::allocator > >::erase(std::_Rb_tree_iterator >) (in /home/thm/test/test) ==723953== by 0x40134C: std::map, std::allocator > >::erase(std::_Rb_tree_iterator >) (in /home/thm/test/test) ==723953== by 0x401170: A::deleteMap() (in /home/thm/test/test) ==723953== by 0x400F4B: main (in /home/thm/test/test) ==723953== ==723953== ==723953== HEAP SUMMARY: ==723953== in use at exit: 0 bytes in 0 blocks ==723953== total heap usage: 10 allocs, 10 frees, 370 bytes allocated ==723953== ==723953== All heap blocks were freed -- no leaks are possible ==723953== ==723953== For counts of detected and suppressed errors, rerun with: -v ==723953== ERROR SUMMARY: 8 errors from 2 contexts (suppressed: 6 from 6)

 void deleteMap() { for (myMap::iterator it = map.begin(); it != map.end(); ++it) { map.erase(it->first); std::cout << "map.first=" << it->first << " map.second=" << it->second << std::endl; } }

 void deleteMap() { for (myMap::iterator it = map.begin(); it != map.end();) { map.erase(it++->first); } } 

 void deleteMap() { for (myMap::iterator it = map.begin(); it != map.end();) { int i = it->first; ++it; map.erase(i); } }