PH23530: THE COMPILER DOES NOT ISSUE MESSAGE MSGIGYCB7311-W FOR THE SENDER WHEN INITCHECK IS USED.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The compiler must assume that the sender and receiver could
  overlap when moving data from another section into the linkage
  section, as the move could overwrite part of the sender. To
  avoid generating incorrect code, the compiler's internal state
  indicates that the sender may be written to when moving data to
  a linkage section receiver.
  
  The INITCHECK option looks at this internal state to determine
  which data items need to be checked (senders whose
  initialization state is uncertain) for each statement. As the
  internal state was indicating that the MOVE statement wrote to
  the sender, the sender was considered initialized, and so the
  compiler did not issue the message flagging the sender as
  uninitialized.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of Enterprise COBOL V6.3 compiling     *
  *                 programs with INITCHECK that move data from  *
  *                 the LOCAL-STORAGE or WORKING-STORAGE         *
  *                 sections to the LINKAGE SECTION with the     *
  *                 sender being uninitialized.                  *
  ****************************************************************
  * PROBLEM DESCRIPTION: The compiler does not issue message     *
  *                      MSGIGYCB7311-W for the sender.          *
  ****************************************************************
  * RECOMMENDATION: Apply the provided PTF.                      *
  ****************************************************************
  The compiler must assume that the sender and receiver could
  overlap when moving data from another section into the linkage
  section, as the move could overwrite part of the sender. To
  avoid generating incorrect code, the compiler's internal state
  indicates that the sender may be written to when moving data to
  a linkage section receiver.
  
  The INITCHECK option looks at this internal state to determine
  which data items need to be checked (senders whose
  initialization state is uncertain) for each statement. As the
  internal state was indicating that the MOVE statement wrote to
  the sender, the sender was considered initialized, and so the
  compiler did not issue the message flagging the sender as
  uninitialized.
  

Problem conclusion

• For MOVEs to the linkage section, the compiler now updates its
  internal state after checking for uninitialized senders rather
  than before, causing the compiler to now issue message
  MSGIGYCB7311-W for uninitialized senders whose data is MOVEd to
  a linkage section receiver.
  

Temporary fix

Comments

APAR Information

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

  PH21380

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

Modules/Macros

• IGY8RWRD IGY8RWTU IGYCASMB IGYCCBE  IGYCCCRT IGYCCICS IGYCCSRV
  IGYCDGEN IGYCDIAG IGYCDMAP IGYCEN$0 IGYCEN$1 IGYCEN$2 IGYCEN$3
  IGYCEN$4 IGYCEN$5 IGYCEN$8 IGYCEN$D IGYCEN$R IGYCFGEN IGYCFREE
  IGYCINIT IGYCJA$0 IGYCJA$1 IGYCJA$2 IGYCJA$3 IGYCJA$4 IGYCJA$5
  IGYCJA$8 IGYCJA$D IGYCJA$R IGYCLIBR IGYCLSTR IGYCLVL0 IGYCLVL1
  IGYCLVL2 IGYCLVL3 IGYCLVL8 IGYCMALL IGYCOB2E IGYCOSCN IGYCPGEN
  IGYCRCTL IGYCRDPR IGYCRDSC IGYCREAL IGYCRWT  IGYCSCAN IGYCSIMD
  IGYCUE$0 IGYCUE$1 IGYCUE$2 IGYCUE$3 IGYCUE$4 IGYCUE$5 IGYCUE$8
  IGYCUE$D IGYCUE$R IGYCXREF IGYDRV   IGYEQCWI IGYMSGE  IGYMSGK
  IGYMSGT  IGYQCBE  IGYQSPLT IGYZQEN6 IGYZQENU IGYZQJP6 IGYZQJPN
  

Fix information

• Fixed component name

  ENT COBOL FOR Z

• Fixed component ID

  5655EC600

Applicable component levels

• R630 PSY UI68641

     UP20/04/01 P F003

• R631 PSY UI68642

     UP20/04/01 P F003

• R632 PSY UI68643

     UP20/04/01 P F003

• R63H PSY UI68644

     UP20/04/01 P F003

Fix is available

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