[Bug libstdc++/46424] Iterators being improperly invalidated

[Shadow7789 at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46424

--- Comment #1 from Brad <Shadow7789 at gmail dot com> 2010-11-11 02:37:56 UTC ---
I forgot to mention one thing.  The code that seems to acting suspisciously is
this bit:

toDo.erase( *out );  //Putting this code here instead of the end breaks this
code.

std::map<PublicKey, std::set<PublicKey> >::const_iterator giter = graph.find(
*out );
std::set<PublicKey>::const_iterator con = giter->second.begin();
std::set<PublicKey>::const_iterator end = giter->second.end();

For some reason, when I look at "con" with gdb, it has a null pointer.  Which
causes the subsequent bit of code to crash.  "end" has a value, but I haven't
tried to figure out if it is pointing to something or not.