Program: 9731
Project: 9731
Buggy source:
public void addInterTypeMunger(ConcreteTypeMunger munger){
  ResolvedMember sig=munger.getSignature();
  if (sig == null) {
    interTypeMungers.add(munger);
    return;
  }
  if (sig.getKind() == Member.METHOD) {
    if (!compareToExistingMembers(munger,getMethods()))     return;
    if (this.isInterface()) {
      if (!compareToExistingMembers(munger,Arrays.asList(world.resolve(OBJECT).getDeclaredMethods()).iterator()))       return;
    }
  }
 else   if (sig.getKind() == Member.FIELD) {
    if (!compareToExistingMembers(munger,Arrays.asList(getDeclaredFields()).iterator()))     return;
  }
 else {
    if (!compareToExistingMembers(munger,Arrays.asList(getDeclaredMethods()).iterator()))     return;
  }
  for (Iterator i=interTypeMungers.iterator(); i.hasNext(); ) {
    ConcreteTypeMunger existingMunger=(ConcreteTypeMunger)i.next();
    if (conflictingSignature(existingMunger.getSignature(),munger.getSignature())) {
      if (isVisible(munger.getSignature().getModifiers(),munger.getAspectType(),existingMunger.getAspectType())) {
        int c=compareMemberPrecedence(sig,existingMunger.getSignature());
        if (c == 0) {
          c=getWorld().comparePrecedence(munger.getAspectType(),existingMunger.getAspectType());
        }
        if (c < 0) {
          return;
        }
 else         if (c > 0) {
          i.remove();
          break;
        }
 else {
          interTypeConflictError(munger,existingMunger);
          interTypeConflictError(existingMunger,munger);
          return;
        }
      }
    }
  }
  interTypeMungers.add(munger);
}

Fixed version (ground truth):
public void addInterTypeMunger(ConcreteTypeMunger munger){
  ResolvedMember sig=munger.getSignature();
  if (sig == null) {
    interTypeMungers.add(munger);
    return;
  }
  if (sig.getKind() == Member.METHOD) {
    if (!compareToExistingMembers(munger,getMethods()))     return;
    if (this.isInterface()) {
      if (!compareToExistingMembers(munger,Arrays.asList(world.resolve(OBJECT).getDeclaredMethods()).iterator()))       return;
    }
  }
 else   if (sig.getKind() == Member.FIELD) {
    if (!compareToExistingMembers(munger,Arrays.asList(getDeclaredFields()).iterator()))     return;
  }
 else {
    if (!compareToExistingMembers(munger,Arrays.asList(getDeclaredMethods()).iterator()))     return;
  }
  for (Iterator i=interTypeMungers.iterator(); i.hasNext(); ) {
    ConcreteTypeMunger existingMunger=(ConcreteTypeMunger)i.next();
    if (conflictingSignature(existingMunger.getSignature(),munger.getSignature())) {
      if (isVisible(munger.getSignature().getModifiers(),munger.getAspectType(),existingMunger.getAspectType())) {
        int c=compareMemberPrecedence(sig,existingMunger.getSignature());
        if (c == 0) {
          c=getWorld().comparePrecedence(munger.getAspectType(),existingMunger.getAspectType());
        }
        if (c < 0) {
          checkLegalOverride(existingMunger.getSignature(),munger.getSignature());
          return;
        }
 else         if (c > 0) {
          checkLegalOverride(munger.getSignature(),existingMunger.getSignature());
          i.remove();
          break;
        }
 else {
          interTypeConflictError(munger,existingMunger);
          interTypeConflictError(existingMunger,munger);
          return;
        }
      }
    }
  }
  interTypeMungers.add(munger);
}