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GNU C++ compiler version 2.1, with Tiemann and Stump patches.  Sunos
4.1. Sparc 2.  Compiling the program below crashes the cc1plus with
fatal error 6.  It has been stripped to its essential elements.  In
particular, the destructor defined for Atoms is essential for creating
the conditions for the crash, as are the dots and arrows of the final
assignment statement.

Doug Moore
(dougm@cs.rice.edu)

Compiler output:
c++ -c -g -v -Wall Sexpr.value.cc
Reading specs from /marsh/comp212/lib/gcc-lib/sun4/2.1/specs
gcc version 2.1
 /marsh/comp212/lib/gcc-lib/sun4/2.1/cpp -lang-c++ -v -undef -D__GNUC__=2 -D__GNUG__=2 -D__cplusplus -Dsparc -Dsun -Dunix -D__sparc__ -D__sun__ -D__unix__ -D__sparc -D__sun -D__unix -g -Wall Sexpr.value.cc /usr/tmp/cca05820.i
GNU CPP version 2.1 (sparc)
 /marsh/comp212/lib/gcc-lib/sun4/2.1/cc1plus /usr/tmp/cca05820.i -quiet -dumpbase Sexpr.value.cc -g -Wall -version -o /usr/tmp/cca05820.s
GNU C++ version 2.1 (sparc) compiled by GNU C version 2.1.
/marsh/comp212/bin/sun4/gcc: Internal compiler error: program cc1plus got fatal signal 6

Compilation exited abnormally with code 1 at Sat Apr 11 22:27:17

Source code:
----------------cut here--------------------------------------------
enum AtomName  {NUL};

class Atom
{
public:
  AtomName type;
  Atom(AtomName);
  ~Atom();
};

class Pair;

class Sexpr
{
private:
  Atom *sAtom;
  
public:
  Sexpr value() const;
};

class Pair
{
public:
  Sexpr head;
  Sexpr tail;
};

Sexpr Sexpr::value() const
{
  Pair* tempPtr;
  tempPtr->tail.sAtom = &Atom(NUL);
}