Re: executable crashing at runtime

From:
seaders69@gmail.com
Newsgroups:
comp.lang.c++
Date:
Fri, 20 Mar 2009 21:16:48 -0700 (PDT)
Message-ID:
<99605eeb-adae-45af-8815-f38cdb5ab041@c11g2000yqj.googlegroups.com>
On Mar 20, 4:37 pm, "Alf P. Steinbach" <al...@start.no> wrote:

* seader...@gmail.com:

Ok, I've changed around a whole load of my code, so now there's
literally only 5-6 methods that are static, which definitely won't get
called until everything else is loaded, so the problem you described
is not relevant any more.

What is happening and very strange, imo, is that as soon as I try to
initialise the same map, which is now a member variable within one of
my classes, the application crashes. The map, as I said, is of <char=

,

int> type and in my constructor I've tried both of

my_map['x'] = 0;
and
my_map.insert(make_pair('x', 0));

and it crashes, during runtime, from both. I'm really stumped at the
this behaviour as I can't see any reason for it to die here.


Reproduce the problem in a *minimal* but complete program and post it her=

e.

Cheers & hth.,

- Alf

PS: The FAQ has some good advice about how to post a question about Code =

That

Does Not Work.

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Due to hosting requirements I need visits to <url:http://alfps.izfree.com=

/>.

No ads, and there is some C++ stuff! :-) Just going there is good. Linkin=

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to it is even better! Thanks in advance!- Hide quoted text -

- Show quoted text -


Ok, so I've finally gotten this down to as minimalist as possible and
3 files. Tighten it any more and the problem disappears.

*** main.cpp ***

#include <Aw.h>
#include <string>
#include <iostream>
#include <map>
#include <vector>

using namespace std;

class aw_funcs {
public:
    aw_funcs() {
        cout << "initialising map begin" << endl;
        obj_move_amounts.insert(make_pair('x', 0));
        cout << "initialising map 1" << endl;
        obj_move_amounts.insert(make_pair('y', 0));
        cout << "initialising map 2" << endl;
        obj_move_amounts.insert(make_pair('z', 0));
        cout << "initialising map end" << endl;
    }
private:
    map<int, int> hud_sessions;
    map<char, int> obj_move_amounts;
    vector<int> obj_ids;
    int sequence[3][3];
};

#include "custom.h"

int main(int argc, char* argv[]) {
    aw_funcs awf;
}

It's active worlds sdk work that I'm doing, so that's what the <Aw.h>
file is, it can be downloaded and perused from here,
http://objects.activeworlds.com/downloads/awsdk77.zip

custom.h

#ifndef CUSTOM_H_
#define CUSTOM_H_

#include <string>
#include <map>
#include <vector>

void _set_coords(std::vector<std::string>, std::map<char, int>&
amounts);

#endif /* CUSTOM_H_ */

custom.cpp

#include "custom.h"

using namespace std;

void _set_coords(vector<string>, map<char, int>& amounts) {
// amounts['x'] = 0;
    amounts.insert(make_pair('x', 0));
}

So, within that code, the things that make it not crash, is within
_set_coords, have the map not do anything to it's members. Or,
comment out <Aw.h>. Now, I need to have that included, so that's not
an option, but also, for how I'm using the program, I need the
_set_coords function as well. Also, if I get rid of custom.h and
custom.cpp, and bring the _set_coords function into the main.cpp file,
it also doesn't crash, but again, this isn't really an option.

Can anyone point me to where this is going wrong, I really am stumped.

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