IV68557: INTERNAL COMPILER ERROR WITH NESTED COMMENTS

XL C/C++ for AIX Fix Pack 11 (February 2015 PTF) for 12.1
XL C/C++ for AIX Fix Pack 12 (May 2015 PTF) for 12.1
XL C/C++ for AIX Fix Pack 13 (August 2015 Update) for 12.1
XL C/C++ for AIX Fix Pack 14 (December 2015 Update) for 12.1
XL C/C++ for AIX Fix Pack 15 (April 2016 Update) for 12.1
XL C/C++ for AIX Fix Pack 16 (July 2016 Update) for 12.1
XL C/C++ for AIX Fix Pack 17 (November 2016 Update) for 12.1
XL C/C++ for AIX Fix Pack 18 (February 2017 Update) for 12.1
XL C/C++ for AIX Fix Pack 19 (August 2017 Update) for 12.1
XL C/C++ for AIX Fix Pack 20 (March 2018 Update) for 12.1
XL C/C++ for AIX Fix Pack 21 (January 2019 Update) for 12.1

APAR status

• Closed as program error.

Error description

• The compiler produces an internal compiler error for the
  following test case:
  
  ===== COMPILE COMMAND:
  xlC -c ice.cpp
  
  ===== TESTCASE:
  $ cat ice.cpp
  class RandomDev
  {
  public:
    virtual double operator()(void) =0;
    virtual double operator()(double x) =0;
  };
  
  class GenericRandomDevFactory
  {
  public:
    virtual RandomDev* create() const =0;
  };
  
  template <typename DevType>
  class RandomDevFactory: public GenericRandomDevFactory
  {
  public:
    RandomDev* create() const
    {
      return new DevType();
    }
  };
  
  template <typename T>
  class Wrapper: public T
  {
  public:
    /*--------------------------------------------
      /*using RandomDev::operator();*/
    using RandomDev::operator();
    --------------------------------------------*/
    double operator()(void) { return 0.0; }
    double operator()(double x) { return x; }
  };
  
  
  int main()
  {
    RandomDevFactory<Wrapper<RandomDev> > r;
    return 0;
  }
  $
  
  
  ===== ACTUAL OUTPUT:
  Compile time ICE
  
  ===== EXPECTED OUTPUT:
  No compile time ICE
  

Local fix

• Properly code the comments.
  

Problem summary

• USERS AFFECTED:
  All users with ill-formed nested comment inside of template
  body that does not get instantiated are affected by this issue.
  
  PROBLEM DESCRIPTION:
  Template body does not get processed until later. This causes
  compiler to crash when it picks up wrongly parsed texts in
  comment block.
  

Problem conclusion

• Fix has been made so that compiler stops incorporation when the
  template body error occurs.
  

Temporary fix

Comments

APAR Information

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

  LI78295

• 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