c++/1099: internal error: 'this' is not an aggregate

[beece at us dot ibm dot com]

>Number:         1099
>Category:       c++
>Synopsis:       internal error: 'this' is not an aggregate
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          support
>Submitter-Id:   net
>Arrival-Date:   Thu Feb 27 16:38:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     Daniel Beece
>Release:        gdb 5.3
>Organization:
>Environment:
aix 4.3.3.0 
>Description:
The problem is GDB does not understand how to display or otherwise
deal with the variables in my method.  The followin shows the
behavior:
---------
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This GDB was configured as "powerpc-ibm-aix4.3.3.0"...(no debugging symbols found)...
(gdb) attach 33676
Attaching to program: ~beece/eclipz/testing/test2/run/myprog, process 33676
(no debugging symbols found)...0xd0011c9c in _pthread_ksleep ()
   from /usr/lib/libpthreads.a(shr_xpg5.o)
(gdb) source mysim.gdb
(gdb) n
Single stepping until exit from function _pthread_ksleep, 
which has no line number information.
0xd00120fc in _pthread_event_wait () from /usr/lib/libpthreads.a(shr_xpg5.o)
(gdb) n
Single stepping until exit from function _pthread_event_wait, 
which has no line number information.
0xd000e0ec in _cond_wait_local () from /usr/lib/libpthreads.a(shr_xpg5.o)
Breakpoint 1 at 0x3106380c: file /afs/apd.pok.ibm.com/u/beece/eclipz/testing/test2/bld/../src/virtadrsp.C, line 29.
(gdb) n
Single stepping until exit from function _cond_wait_local, 
which has no line number information.

Breakpoint 1, VirtAdrSpace::__ct (this=0x30e5672c, spname=<incomplete type>, type_id=2)
    at /afs/apd.pok.ibm.com/u/beece/eclipz/testing/test2/bld/../src/virtadrsp.C:29
Current language:  auto; currently c++
(gdb) n
(gdb) print   orunused_std_bits = false;
Internal error: `this' is not an aggregate
(gdb) 

-----------------

The following is the code snippet where I'm trying to display
the variable:

  ...
VirtAdrSpace::VirtAdrSpace( string spname, int type_id ) : AdrSpace( type_id ), AdrListHandler( 40 ), Alet() {   // 10 list to start with

  orunused_std_bits = false;
  cs_num_cc_used = NULL;
  ... 

--------------------------

A grep on the source directory for this message shows it appears 
in valops.c about line 3014:

  if (TYPE_CODE (t) != TYPE_CODE_STRUCT
      && TYPE_CODE (t) != TYPE_CODE_UNION)
    error ("Internal error: `this' is not an aggregate");
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: