Throw & catch bug?

[jorgefm@cirsa.com]

Hi

I have the next program:

#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>


class TException
{
  public:
    TException(const char *why );
    virtual ~TException();
    virtual char *GetMsgError() { return m_why; }

  protected:
    char *m_why;
};

TException::TException(const char *why)
{
  printf("Begin Constructor\n");
  m_why = (char *)malloc( strlen( why ) + 1 );
  if( m_why != NULL ) {
    strcpy( m_why, why );
    printf( " Error Message: \"%s\"\n", GetMsgError() );
  }
  printf("End Constructor\n");
}


TException::~TException()
{
  printf("Begin Destructor\n");
  if( m_why != NULL ) {
    free( m_why );
    m_why = NULL;
  }
  printf("End Destructor\n");
}

int main(void)
{
  try {
    printf( "Before Throw\n" );
    throw TException( "Generate exception" );
    printf( "After Throw\n" );
  } catch(TException& e) {
    printf("Catch \n");
    printf( " Error: \"%s\"\n", e.GetMsgError() );
  }
  return 0;
}


And the output is:

Before Throw
Begin Constructor
 Error Message: "Generate exception"
End Constructor
Begin Destructor
End Destructor
Catch
 Error: "0?$¡@¡"
Begin Destructor
End Destructor

How can the destructor call twice, one after throw (incorrect) and the
second and ok at the end of the catch.

I have gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release). That's
 a known bug?. Anybody knows a
solution. I have try with 'new' and 'delete' and its ok.

try {
  throw new TException( .. );
} catch( TException *e) {
  e->Get...
  delete e;
}

jorgefm@lgcirsa.com
Thanks for your time.