[Bug c++/34839] New: stl vector.resize() strange behaviour

[facorread at gmail dot com]

I am sorry for not being able to investigate further about this bug.

Please compile and run the following program:

using namespace std;
#include <vector>
#include <iostream>

class MyClass {
        public:
                MyClass () { cout << "Object created." << endl; };
                ~MyClass() { cout << "Object destroyed." << endl; };
};

int main (void) {
        vector<MyClass> vec;
        cout << "Starting..." << endl; vec.resize(3);
        cout << "Resizing..." << endl; vec.resize(2);
        cout << "Exiting and destroying objects..." << endl;
        return 0;
}

The output SHOULD be as follows:
Starting...
Object created.
Object created.
Object created.
Resizing...
Object destroyed.
Exiting and destroying objects...
Object destroyed.
Object destroyed.

The produced output is as follows:
Starting...
Object created.
Object destroyed.
Resizing...
Object created.
Object destroyed.
Object destroyed.
Exiting and destroying objects...
Object destroyed.
Object destroyed.

A similar behaviour is observed when declaring vec with the line
        vector<MyClass> vec(1, MyClass());

I reproduced the behavior in a i686-pc-linux-gnu box.


-- 
           Summary: stl vector.resize() strange behaviour
           Product: gcc
           Version: 4.1.2
            Status: UNCONFIRMED
          Severity: critical
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: facorread at gmail dot com
  GCC host triplet: x86_64-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34839