LI75050: MISSING INSTANTIATION WITH LOCAL CLASS

October 2009 Update for XL C/C++ for Linux, V10.1
June 2011 Update for XL C/C++ for Linux, V10.1
XL C/C++ for Linux Fix Pack 8 (January 2014 Update) for 10.1
August 2010 Update for XL C/C++ for Linux, V10.1
January 2011 Update for XL C/C++ for Linux, V10.1
January 2012 Update for XL C/C++ for Linux, V10.1
July 2012 Update for XL C/C++ for Linux, V10.1

APAR status

• Closed as program error.

Error description

• An invalid error is generated related to a missing instantiated
  template with a local class.
  
  -----------------------------------------
  "t.C", line 12.12: 1540-0253 (S) This use of undefined class
  "R<A>" is not valid
  -----------------------------------------
  
    === TEST CASE ===
  
  #include <new>
  
  template<class T> class R { };
  template<class T> T* baz() { return NULL; }
  
  struct A { };
  
  R<A> foo();
  void bar(R<A>, A*);
  
  //template class R<A>; // uncommenting this fixes the error
  1540-0253
  
  int main(int ac, char **av) {
  struct F {
  ~F() { }
  } f;
  bar(foo(), new (baz<A>()) A());
  }
  

Local fix

• Provide forward declaration for template class.
  

Problem summary

• USER AFFECTED:
  The problem appears when a function body has a local class
  with a user-defined destructor followed by an implicit
  instantiation.
  
  PROBLEM DESCRIPTION:
  In certain cases the implicit instantiation might be missed
  causing an error that the template instance is not defined.
  

Problem conclusion

• The implicit instantiation is created when required.
  

Temporary fix

Comments

APAR Information

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

  IZ48094

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

Fix information

• Fixed component name

  XL C/C++ RHEL52

• Fixed component ID

  5724U8310

Applicable component levels

• RA10 PSN IZ48094

     UP06/09/13