c++/8563: C++ Standard Issue ( 15.2.2 violation ) : Base class destructor is not called during exception handling.

[sunil.k.davasam@intel.com]

>Number:         8563
>Category:       c++
>Synopsis:       C++ Standard Issue ( 15.2.2 violation ) : Base class destructor is not called during exception handling.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Nov 13 11:16:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     sunil.k.davasam@intel.com
>Release:        gcc-3.2
>Organization:
>Environment:
I tried on IA32 Redhat8.0 product, with gcc3.2 compiler.
>Description:
This testcase has a exception in derived class destructor, there is no catch inside destructor. There is a matching catch in main(). This is to check  whether the base class destructor is called during exception handling.

-------------------------t2.cpp........................
#include <stdio.h>
struct C1
{
        virtual int f9()        { return 1; }
        C1() { printf("C1()\n" ); }
        ~C1() { printf("~C1()\n" ); }
};

struct C2 : public C1 {
        C2() { printf("C2()\n" ); }
        ~C2() { printf("~C2()\n" );  throw 1; }
};


int main()
{
        try {
                C2 o2;
        } catch ( C1 o1 ) {
                printf("Catching C%d exception.\n",1 );
        } catch ( int i ) {
                printf("Catching int exception.\n" );
        }
        return 0;
}

----------------------------------------------
Expected output:
------------
C1()
C2()
~C2()
~C1()
Catching int exception.
-------------
Actual output:
--------
C1()
C2()
~C2()
Catching int exception.
--------

Based on C++ Standard  ( except.ctor  ) 15.2.2:

An object that is partially constructed or partially destroyed will have destructors executed for all of its fully constructed subobjects, that is, for subobjects for which the constructor has completed execution and the destructor has not yet begun execution.
-------

>How-To-Repeat:
[skdavasa@csattert1 failed_testcases]$ g++ t2.cpp
[skdavasa@csattert1 failed_testcases]$ a.out
C1()
C2()
~C2()
Catching int exception.
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: text/plain; name="t3.cpp"
Content-Disposition: inline; filename="t3.cpp"

#include <stdio.h>
struct C1
{
	virtual int f9()	{ return 1; }
	C1() { printf("C1()\n" ); }
	~C1() { printf("~C1()\n" ); }
};

struct C2 : public C1 {
	C2() { printf("C2()\n" ); }
	~C2() { printf("~C2()\n" );  throw 1; }
};


int main()
{
	try {
		C2 o2;
	} catch ( C1 o1 ) {
		printf("Catching C%d exception.\n",1 );
	} catch ( int i ) {
		printf("Catching int exception.\n" );
	}
	return 0;
}