IZ96301: -QCHECK CAUSING UNEXPECTED TRAP

May 2012 PTF for XL C/C++ for AIX, V10.1
January 2013 PTF for XL C/C++ for AIX, V10.1
XL C/C++ for AIX Fix Pack 18 (July 2013 PTF) for 10.1
XL C/C++ for AIX Fix Pack 19 (October 2013 PTF) for 10.1
XL C/C++ for AIX Fix Pack 21 (October 2015 PTF) for 10.1
May 2011 PTF for XL C/C++ for AIX, V10.1
October 2011 PTF for XL C/C++ for AIX, V10.1
February 2012 PTF for XL C/C++ for AIX, V10.1
September 2012 PTF for XL C/C++ for AIX, V10.1
XL C/C++ for AIX Fix Pack 20 (October 2014 PTF) for 10.1

APAR status

• Closed as program error.

Error description

• The following test case traps at runtime when compiling with
  -qcheck.
  
  ===== COMPILE COMMAND:
  xlC_r -o tc tc.cpp -q64 -qcheck -D__IBMCPP_TR1__
  
  
  ===== TESTCASE:
  $cat test.cpp
  #include <iostream>
  #include <memory>
  #include <unordered_set>
  #include <map>
  
  int main()
  {
  std::map< std::pair<unsigned int, unsigned int>,
  std::tr1::unordered_set<unsigned int> > index;
  std::pair<unsigned int, unsigned int> const
  pair(std::make_pair<unsigned int, unsigned int>(1, 10001));
  std::tr1::unordered_set<unsigned int>& record(index[pair]);
  }
  
  ===== ACTUAL OUTPUT:
  $ ./tc
  Trace/BPT trap (core dumped)
  
  
  ===== EXPECTED OUTPUT:
  Should not trap
  

Local fix

• n/a
  

Problem summary

• USERS AFFECTED:
  Users that use -qcheck and hash containers may be affected by
  this issue.
  
  PROBLEM DESCRIPTION:
  The hash container traps when using -qcheck due to a missing
  check.
  

Problem conclusion

• The hash container has been fixed to fix the scenario when
  _Copy where _F != _L and _Rhs is empty.
  

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:

  LI76207 LI76231

Fix information

• Fixed component name

  XL C++ AIX

• Fixed component ID

  5724U8100

Applicable component levels