IV76884: OVERLY RESTRICTED METHODHANDLE RETURNED FROMMETHODHANDLES$LOOKUP.UNREFLECT(), METHODHANDLES$LOOKUP.FINDSPECIAL() AND METHODHANDL

APAR status

• Closed as program error.

Error description

• Error Message: Methods
  java/lang/invoke/MethodHandles$Lookup.unreflect(),
  java/lang/invoke/MethodHandles$Lookup.findSpecial() and
  java/lang/invoke/MethodHandles$Lookup.findVirtual() return an
  overly restricted MethodHandle when the protected (non-static)
  method is defined in a different runtime package from the
  accessing class, and the accessing class is NOT a subclass of
  the defining class.
  .
  Stack Trace: N/A
  .
  

Local fix

Problem summary

• In the scenario described above, the receiver argument that was
  being returned in the MethodHandle, was being incorrectly
  narrowed down to the accessing class.
  

Problem conclusion

• The JVM has been changed such that, in the above condition, the
  receiver argument that is returned in the MethodHandle will be
  narrowed down to the accessing class, only when the accessing
  class is a subclass of the class where the protected method is
  defined.
  .
  This APAR will be fixed in the following Java Releases:
     8    SR2       (8.0.2.0)
     7 R1 SR3 FP40  (7.1.3.40)
  .
  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:

Fix information

• Fixed component name

  J9 COMMON CODE

• Fixed component ID

  620700127

Applicable component levels

• R270 PSY

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