Exception handling bug (2): gcc-2.95.2 (unfixed from gcc-2.95.1)

[Chris Rankin]

Hi,
The following code core-dumps when compiled with gcc-2.95.2,
i586-pc-linux-gnu using binutils 2.9.5. The problem seems to be
triggered when the -fomit-frame-pointer option is active.

Cheers,
Chris.
#include <string>
#include <iostream>
using namespace std;


/******************************************************
 * class Exception
 */
class Exception {
private:
  string m_msg;
public:
  Exception(const string &msg) : m_msg(msg) {}
  const string& get_msg() const { return m_msg; }
};

void throw_Exception(const string &msg)  __attribute__((noreturn));


void
throw_Exception(const string &msg)
{
  throw Exception(msg);
}

/***************************************************
 * class Thing
 */
class Thing
{
public:
  Thing();
  void open();

  static bool is_error(int)  __attribute__((const));
  static void check_code(int);
};


Thing::Thing() {}


inline bool
Thing::is_error(int code)
{
  return (code >= 400) && (code <= 599);
}


void
Thing::check_code(int code)
{
  if ( is_error(code) )
  {
    throw_Exception("crash!");
  }
}


void
Thing::open()
{
  check_code(530);
}


/************************************************************
 * class AppObj
 */
class AppObj
{
private:
  Thing m_thing;

public:
  AppObj();
  void open();
};


AppObj::AppObj()
  : m_thing()
{}


void
AppObj::open()
{
  m_thing.open();
}


/************************************************************
 * main
 */
int
main()
{
  try
  {
    AppObj  app;
    app.open();
  }
  catch(const Exception &e)
  {
    cout << "Caught application exception" << endl;
  }
  catch(...)
  {
    cout << "Caught unknown exception" << endl;

  }

  return 0;
}