IV28202: EMPTY STRUCT ASSIGNMENT OPERATOR WRITING BYTE

February 2013 PTF for XL C/C++ for AIX, V11.1
XL C/C++ for AIX Fix Pack 14 (May 2013 PTF) for 11.1
XL C/C++ for AIX Fix Pack 15 (August 2013 PTF) for 11.1
XL C/C++ for AIX Fix Pack 16 (November 2013 PTF) for 11.1
XL C/C++ for AIX Fix Pack 17 (February 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 18 (May 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 19 (August 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 20 (November 2014 PTF) for 11.1
XL C/C++ for AIX Fix Pack 21 (April 2015 PTF) for 11.1
XL C/C++ for AIX Fix Pack 22 (September 2015 PTF) for 11.1
XL C/C++ for AIX Fix Pack 23 (March 2016 PTF) for 11.1
XL C/C++ for AIX Fix Pack 24 (September 2016 PTF) for 11.1

APAR status

• Closed as program error.

Error description

• The default assignment operator for an empty struct is writing a
  single byte during the assignment.  This can cause unexpected
  output, or overwritten data when a class is cast as an empty
  struct and the assignment operator is used.
  

Local fix

• N/A
  

Problem summary

• PROBLEM DESCRIPTION:
  An implicit copy assignment operator copies 1 byte for an empty
  class.
  
  USERS AFFECTED:
  Copy assignment objects with empty class type or casting to
  empty class type before copy assignment.
  

Problem conclusion

• The issue was corrected, and the 1 byte is no longer copied.
  

Temporary fix

Comments

APAR Information

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

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

  IV31746 LI77150 LI77442

Fix information

• Fixed component name

  XL C/C++ AIX

• Fixed component ID

  5724X1300

Applicable component levels

• RB10 PSY U858036

     UP C