LI78598: INVALID VIRTUAL FUNCTION DEFINITION CAUSING INTERNAL COMPILER ERROR

XL C/C++ for Blue Gene/Q Fix Pack 12 (May 2015 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 14 (May 2016 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 15 (October 2017 Update) for 12.1
XL C/C++ for Blue Gene/Q Fix Pack 13 (August 2015 Update) for 12.1

APAR status

• Closed as program error.

Error description

• An invalid virtual function definition is causing an internal
  compiler error instead of a diagnostic message.
  
  
     === TEST CASE ===
  
  #include <memory>
  
  class Parent {
    public:
     virtual long test() const   = 0;
  };
  
  class ChildClass : public Parent {
    public:
      virtual long test() const;
  };
  
  template <typename T>
  class ChildTemplateClass : public Parent {};
  
  template <typename T>
  long ChildTemplateClass<T>::ChildClass::test() const
  {
    return 0;
  }
  
  std::auto_ptr<Parent> test()
  {
    return std::auto_ptr<Parent>( new ChildTemplateClass<int>());
  }
  
     === OUTPUT ===
  $ xlC apar.cpp
  xlC: 1501-230 (S) Internal compiler error; please contact your
  Service Representative. For more information visit:
  http://www.ibm.com/support/docview.wss?uid=swg21110810
  $
  
     === EXPECTED OUTPUT ===
  $ xlC apar.cpp
  "apar.cpp", line 17.29: 1540-0129 (S) The qualifier "ChildClass"
  is not defined in the current scope.
  $
  

Local fix

Problem summary

• PROBLEM DESCRIPTION:
  The compiler is not correctly emitting the expected error
  message for the errror condition, causing an internal compiler
  error.
  
  USERS AFFECTED:
  The error might be seen after an implicit instantiation failed
  with a valid error message.
  

Problem conclusion

• The problem has been resolved.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IV69096

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  XL C/C++ FOR BG

• Fixed component ID

  5799AG100

Applicable component levels