Re: GCC3.0-release and multiple inheritance

[Nathan Sidwell <nathan at codesourcery dot com>]

Kalvinder Singh wrote:
> 
> Hi Nathan,
> 
> You might want to have a look at this bug as well. Just in case it is
> related. It is reproducable on an i686 machine.
> 
> http://gcc.gnu.org/ml/gcc-bugs/2001-08/msg00081.html
This appears to be a different problem. I've reduced it down to the attached.
in main, we copy construct two C objects during the call to Foo.
Foo gets one of these by value, which is dtor'd in Foo. upon return
we dtor the other one. I think this is a problem with the pass-by-value
ABI method. It does look like a bug. Please file a gnats bug report.


nathan

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#include <stdio.h>

class C
{
  int m;
  
public:
  C() {printf ("ctor %s %p\n", __PRETTY_FUNCTION__, (void *)this);};
  ~C() {printf ("dtor %s %p\n", __PRETTY_FUNCTION__, (void *)this);};
};


void Foo (C c) {printf ("in Foo %p\n", (void *)&c);}

int main(int argc, char *argv[])
{       
  C c;

  printf ("Before Foo in main \n");
  Foo (c);
  printf ("After Foo in main \n");
  return 1;
}