Re: Help with strange (for me) STL problem that disappers when rebuilding all

From:

"Jim Langston" <tazmaster@rocketmail.com>

Newsgroups:

comp.lang.c++

Date:

Sun, 29 Apr 2007 20:23:33 -0700

Message-ID:

<_idZh.1829$VE.330@newsfe12.lga>

"StephQ" <askmeofit@mailinator.com> wrote in message
news:1177858052.754457.38890@e65g2000hsc.googlegroups.com...

I have a class Bounds with two constructors:

class Bounds
{
private:

list<Segment> upperLinearSpline; // Upper bound.
list<Segment> lowerLinearSpline; // Lower bound.
...

}

Bounds::Bounds()
{
}

Bounds::Bounds(double lo, double up)
{
lowerLinearSpline.push_back( Segment(Point(0, lo), 0, -HUGE_VAL,
HUGE_VAL) );

upperLinearSpline.push_back( Segment(Point(0, up), 0, -HUGE_VAL,
HUGE_VAL) );
}

Segment is another class with default constructor.
I have not defined destructors, copy constructor and copy assignement.
So the automatic membewise-copy should be used.

The class Bounds appears in other classes in the construtors as or/and
as reference member data like
....
private:
const Bounds& bounds;
...

Until here everything is working fine.

Now I write code for another class in which Bounds appears only in the
constructor as (not as member data) like:
UniformEnvelope::UniformEnvelope(const Bounds& bounds, .......

You have some class that accepts a constant reference to an instance of
Bounds. Well, you haven't shown any code where the constructor would be
called. Why don't you try posting a complete compilable program that shows
the issue? We're only getting bits and pieces here.

and what happends is that when I add the source code and header file
of this new class and compile normally the constructor
Bounds::Bounds(double lo, double up) stop working.
In debug mode I get no error/exceptio at all but I notice that the
push_back() is not working correctly. It does not report any error but
if simply fails to insert the value.

If it is of any help looking in the standart template library the
function failed to insert (does not return error/exception but after
this call in (*this) i see: "(error) 0" as unique element using the
debugger) is _Incsize(1) in:

void _Insert(iterator _Where,
const _Ty& _Val)
{ // insert _Val at _Where

#if _HAS_ITERATOR_DEBUGGING
if (_Where._Mycont != this)
_DEBUG_ERROR("list insert iterator outside range");
#endif /* _HAS_ITERATOR_DEBUGGING */

_Nodeptr _Pnode = _Where._Mynode();
_Nodeptr _Newnode = _Buynode(_Pnode, _Prevnode(_Pnode), _Val);
_Incsize(1);
_Prevnode(_Pnode) = _Newnode;
_Nextnode(_Prevnode(_Newnode)) = _Newnode;
}

in the <list> file.

The very strange thing (for me at least) is that recompiling the whole
project solves the problem.
Do you have any idea of what the problem could be and how could I
check it?

Thank you
StephQ