IV75539: INTERNAL ERROR WITH INLINE TEMPLATE USAGE WITH IMPLICIT TEMPLATE INSTANTIATION

XL C/C++ for AIX Fix Pack 4 (July 2015 PTF) for 13.1
XL C/C++ for AIX Fix Pack 5 (November 2015 PTF) for 13.1
XL C/C++ for AIX Fix Pack 6 (February 2016 PTF) for 13.1
XL C/C++ for AIX Fix Pack 7 (May 2016 PTF) for 13.1
XL C/C++ for AIX Fix Pack 8 (August 2016 PTF) for 13.1
XL C/C++ for AIX Fix Pack 9 (June 2017 PTF) for 13.1
XL C/C++ for AIX Fix Pack 10 (February 2018 PTF) for 13.1
XL C/C++ for AIX Fix Pack 11 (November 2018 PTF) for 13.1

APAR status

• Closed as program error.

Error description

• An internal compiler error is encountered with a C++ template
  usage scenario where an inline member template contains an
  implicit instantiation of another member template.
  
  
     === TEST CASE ===
  
  struct Dummy { Dummy(char *src) {} };
  
  template <typename Type>
  class MyClass1
  {
      template <typename T>
      class InClass1 {};
  
      template<typename T, bool a>
      class InClass2;
  
      template<typename T>
      class InClass2<T, true>
      {
          InClass1<char> t;
      };
  
      template<typename T1, typename T2>
      void r() {}
  };
  
  template <typename Type>
  class MyClass2
  {
   public:
      template <typename T1, typename T2>
      MyClass2& run2(T2& is)
      {
          MyClass1<T1> t(&someFunc());
          return *this;
      }
  
      MyClass2& run(char* str)
      {
          Dummy t(str);
          return run2<Type>(t);
      }
  };
  
  int main()
  {
      MyClass2<int> a;
      a.run("test");
  }
  
  
  $ xlC -c 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
  $
  
  (Note:  Test case demonstrates internal compiler error
  only - it contains a source error because no definition for
  'someFunc()' exists)
  

Local fix

Problem summary

• PROBLEM DESCRIPTION:
  Compiler logic to traverse and process member templates of
  another template was out-of-sync when encountering the implicit
  instantiation declaration.
  
  USERS AFFECTED:
  Users with code containing a member template defined inline and
  containing an implicit instantiation of another member template.
  

Problem conclusion

• The problem has been fixed.
  

Temporary fix

Comments

APAR Information

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

  IV74013

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

Fix information

• Fixed component name

  XL C/C++ FOR AI

• Fixed component ID

  5725C7200

Applicable component levels