IV84210: CANNOT COMPILE DESIGNATED INITIALIZERS

XL C for AIX Fix Pack 2 (July 2016 PTF) for 13.1.3
XL C/C++ for AIX Fix Pack 2 (July 2016 PTF) for 13.1.3
XL C for AIX, V13.1.3.3 Fix Pack (December 2016)
XL C/C++ for AIX, V13.1.3.3 Fix Pack (December 2016)
XL C for AIX, V13.1.3.4 Fix Pack (April 2017)
XL C/C++ for AIX, V13.1.3.4 Fix Pack (April 2017)
XL C for AIX, V13.1.3.5 Fix Pack (July 2018)
XL C/C++ for AIX, V13.1.3.5 Fix Pack (July 2018)
XL C for AIX, V13.1.3.6 Fix Pack (May 2019)
XL C/C++ for AIX, V13.1.3.6 Fix Pack (May 2019)

APAR status

• Closed as program error.

Error description

• The following test case issues an unexpected error message:
  
  ===== COMPILE COMMAND:
  xlc test.c
  
  ===== TESTCASE:
  $ cat test.c
  /* Designated initializers for aggregate types */
  #include <stdint.h>
  
  struct smb2_handle {
    uint64_t data[2];
  };
  union smb_handle {
    struct smb2_handle handle;
  };
  struct smb2_ioctl_in {
    union smb_handle file;
  };
  
  int main(int argc, char **argv) {
    struct smb2_handle h = (struct smb2_handle) { .data = { } };
    struct smb2_ioctl_in iotclin = (struct smb2_ioctl_in) {
      .file.handle = h
    };
    return 0;
  }
  $
  
  
  ===== ACTUAL OUTPUT:
  $ xlc test.c
  "test.c", line 17.20: 1506-196 (S) Initialization between types
  "unsigned long long" and "struct smb2_handle" is not allowed.
  $
  
  
  ===== EXPECTED OUTPUT:
  Should compile clean
  

Local fix

• N/A
  

Problem summary

• USERS AFFECTED:
  Clients who use a designated initializer with a struct or union
  that has another struct or union as a its member maybe affected
  by this issue.
  
  PROBLEM DESCRIPTION:
  The C frontend assigns a wrong value at this case.
  

Problem conclusion

• The compiler has been fixed
  

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

  XL C FOR AIX

• Fixed component ID

  5725C7100

Applicable component levels

• RD13 PSY

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