IV79146: UNEXPECTED NPE THROWN ON X86 PLATFORMS

APAR status

• Closed as program error.

Error description

• Error Message: unexpected java.lang.NullPointerException is
  thrown from Java program
  .
  Stack Trace: java.lang.NullPointerException
   at
  org.jruby.runtime.ThreadContext.pollThreadEvents(ThreadContext.j
  ava:662)
   at org.jruby.ast.CaseNode.interpret(CaseNode.java:123)
   at
  org.jruby.ast.NewlineNode.interpret(NewlineNode.java:105)
   at
  org.jruby.evaluator.ASTInterpreter.INTERPRET_BLOCK(ASTInterprete
  r.java:1 12)
  .
  This problem can only occur on x86 platforms.
  

Local fix

• This issue might be worked around with the Java option
  -Xjit:disableLoopVersioner. However, this might not work for all
  the cases.
  

Problem summary

• This problem happens because that x86 code generator decides not
  to generate the null test based on a flag on the variable which
  was wrongly set by a loop related optimization.
  

Problem conclusion

• The loop related optimization has been fixed to avoid setting
  the flag in certain cases.
  .
  This APAR will be fixed in the following Java Releases:
   8 SR2 FP10 (8.0.2.10)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, information about the available
  Service Refreshes and Fix Packs can be found at:
   https://www.ibm.com/developerworks/java/jdk/
  

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:

• Fixed component name

  JIT

• Fixed component ID

  620700124

Applicable component levels

• R130 PSY

     UP