gdb/632: g++ compiled struct structname structname; => can't eval structname.

[rbrown64 at csc dot com dot au]

>Number:         632
>Category:       gdb
>Synopsis:       g++ compiled struct structname structname; => can't eval structname.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Aug 06 02:18:00 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     rbrown64@csc.com.au
>Release:        gdb-5.2
>Organization:
>Environment:
Reading specs from /usr/lib/gcc-lib/i386-linux/2.95.2/specs  
gcc version 2.95.2 20000220 (Debian GNU/Linux)  
>Description:
501 ~ % cat tmp.c  
#include <stdio.h>  

struct a {  
    int b;  
};  

struct a a;  

int main(int argc, char **argv)  
{  
    a.b = argc;  
    printf("%d %s\n", a.b, argv[0]);  
    exit(0);  
}  
502 ~ % gcc -v  
Reading specs from /usr/lib/gcc-lib/i386-linux/2.95.2/specs  
gcc version 2.95.2 20000220 (Debian GNU/Linux)  
503 ~ % gcc -g -o tmp.bin tmp.c  
504 ~ % src/gdb-5.2.obj/gdb/gdb tmp.bin
GNU gdb 5.2  
Copyright 2002 Free Software Foundation, Inc.  
...
This GDB was configured as "i686-pc-linux-gnu"...  
(gdb) b 12
Breakpoint 1 at 0x804841e: file tmp.c, line 12.  
(gdb) r  
Starting program: /var/home/rdb/tmp.bin   

Breakpoint 1, main (argc=1, argv=0xbffff174) at tmp.c:12  
12        printf("%d %s\n", a.b, argv[0]);
(gdb) p a  
$1 = {b = 1}  
(gdb) c  
Continuing.  
1 /var/home/rdb/tmp.bin  

Program exited normally.  
(gdb) q  
505 ~ % g++ -g -o tmp.bin tmp.c
506 ~ % src/gdb-5.2.obj/gdb/gdb tmp.bin
GNU gdb 5.2
Copyright 2002 Free Software Foundation, Inc.
...
This GDB was configured as "i686-pc-linux-gnu"...
(gdb) b 12
Breakpoint 1 at 0x804853e: file tmp.c, line 12.
(gdb) r
Starting program: /var/home/rdb/tmp.bin

Breakpoint 1, main (argc=1, argv=0xbffff174) at tmp.c:12
12        printf("%d %s\n", a.b, argv[0]);
(gdb) p a
Attempt to use a type name as an expression
(gdb) ptype a
type = class a {
  public:
    int b; 

    a & operator=(a const &);
    a(a const &);
    a(void);
}
(gdb) c
>How-To-Repeat:

>Fix:

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