[Bug c/17569] New: error: incompatible types in assignment

[kminola at eng dot umd dot edu]

/* Using gcc-3.4.2 with stmt 2 uncommented gives

% gcc -c foo.c
foo.c: In function `foo':
foo.c:21: error: incompatible types in assignment
%

However if you comment out stmt 2 and uncomment stmt 1, you
get

% gcc -c foo.c
%

Stmt 1 looks to be syntactically equivalent to stmt 2.  Why
does one compile and the other not?  This seems like a bug.

The same things happens using gcc-4.0-20040912.

Configuration Details:

% uname -a
Linux brutus 2.4.20-6 #1 Thu Feb 27 10:06:59 EST 2003 i686 i686 i386 GNU/Linux
%
% gcc -v
Reading specs from /usr/local/gcc-3.4.2/x86-Linux/lib/gcc/i686-pc-linux-gnu/3.4.
2/specs
Configured with: ../gcc-3.4.2/configure --enable-languages=c --prefix=/usr/local
/gcc-3.4.2/x86-Linux
Thread model: posix
gcc version 3.4.2
%

*/

typedef struct
{
  int  a;
} t_a;

typedef struct
{
  t_a  b;
} t_b;

void foo(c)
t_b *c;
{
/* stmt 1 - this compiles
  t_a *d = &c->b;
*/

/* stmt 2 - this does not
*/
  t_a *d;
  *d = &c->b;
}

-- 
           Summary: error: incompatible types in assignment
           Product: gcc
           Version: 3.4.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kminola at eng dot umd dot edu
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17569