APAR status
Closed as program error.
Error description
Error Message: A NullPointerException is thrown in a context where a field is being used, and that field has very recently been initialized by a constructor. . Stack Trace: N/A .
Local fix
-Xjit:disableLookahead
Problem summary
An alias computation in the JIT compiler that was intended to combine several sources of information could erroneously omit one source. This caused the optimizer to conclude incorrectly that a constructor does not alter a particular field, leading it to assume that the field must be null, and then to transform the code accordingly in such a way that a NullPointerException is thrown. It is also possible that this can affect non-reference fields, causing them to appear incorrectly to contain zeros.
Problem conclusion
This defect will be fixed in: 6.0.1 SR7 7.0.0 SR6 . The alias computation was fixed so it does not omit any sources of alias information.
Temporary fix
Comments
APAR Information
APAR number
IV44794
Reported component name
JIT
Reported component ID
620700124
Reported release
260
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2013-06-24
Closed date
2013-08-14
Last modified date
2013-08-14
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
PI11124
Fix information
Fixed component name
JIT
Fixed component ID
620700124
Applicable component levels
R260 PSY
UP
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Document Information
Modified date:
14 August 2013