[Bug c/14714] New: segfault when initializing a flexible array member using designated initializer

[Bug c/14714] New: segfault when initializing a flexible array member using designated initializer

[henryhack101 at netscape dot net]

According to the docs, initilization of a flexible array member is allowed.
So the following should be legal right?
I would expect it to output "1 0 2" when run which is what I would get if I
declare the array as "int y [2]"
In any case, it should not seg fault.

henry@zulu:~/test> more t3.c
#include <stdio.h>
struct A {
        int x;
        int y [];
};
struct A a1 = {1,{[1]=2}};
int main(){
  printf("%d %d %d\n", a1.x, a1.y[0], a1.y[1] );
  return 0;
}

henry@zulu:~/test> gcc t3.c -Wall
t3.c:6: internal error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
-----------------------------------------------------------------------
henry@zulu:~/test> gcc -v
Reading specs from /usr/lib/gcc-lib/powerpc-suse-linux/3.2.2/specs
Configured with: ../configure --enable-threads=posix --prefix=/usr
--with-local-prefix=/usr/local --infodir=/usr/share/info --mandir=/usr/share/man
--libdir=/usr/lib --enable-languages=c,c++,f77,objc,java,ada --enable-libgcj
--with-gxx-include-dir=/usr/include/g++ --with-slibdir=/lib --with-system-zlib
--enable-shared --enable-__cxa_atexit powerpc-suse-linux
Thread model: posix
gcc version 3.2.2

-- 
           Summary: segfault when initializing a flexible array member using
                    designated initializer
           Product: gcc
           Version: 3.2.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: henryhack101 at netscape dot net
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14714

[Bug c/14714] segfault when initializing a flexible array member using designated initializer

[henryhack101 at netscape dot net]

------- Additional Comments From henryhack101 at netscape dot net  2004-03-24 07:49 -------
It seems I can designate the first element of the array though.
struct A a1 = {1,{[0]=2}};

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|segfault when initializing a|segfault when initializing a
                   |flexible array member using |flexible array member using
                   |designated initializer      |designated initializer


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14714

[Bug c/14714] segfault when initializing a flexible array member using designated initializer

[bangerth at dealii dot org]

------- Additional Comments From bangerth at dealii dot org  2004-03-24 15:49 -------
Confirmed, we get an ICE for 3.3 and later: 
 
g/x> /home/bangerth/bin/gcc-3.3.4-pre/bin/gcc -std=c99 -c x.c 
x.c:6: internal compiler error: Segmentation fault 
Please submit a full bug report, 
with preprocessed source if appropriate. 
See <URL:http://gcc.gnu.org/bugs.html> for instructions. 
 
g/x> /home/bangerth/bin/gcc-3.4-pre/bin/gcc -std=c99 -c x.c 
x.c:6: internal compiler error: Segmentation fault 
Please submit a full bug report, 
with preprocessed source if appropriate. 
See <URL:http://gcc.gnu.org/bugs.html> for instructions. 
 
g/x> /home/bangerth/bin/gcc-3.5-pre/bin/gcc -std=c99 -c x.c 
x.c:6: internal compiler error: Segmentation fault 
Please submit a full bug report, 
with preprocessed source if appropriate. 
See <URL:http://gcc.gnu.org/bugs.html> for instructions. 
 
I assume the code is valid but undefined, since icc gives a warning 
like so: 
 
g/x> icc -Xc -ansi -c x.c 
x.c(6): warning #1368: excess initializers are ignored 
  struct A a1 = {1,{[1]=2}}; 
                    ^ 
 
W. 

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
           Keywords|                            |ice-on-valid-code
      Known to fail|                            |3.3.3 3.4.0 3.5.0
   Last reconfirmed|0000-00-00 00:00:00         |2004-03-24 15:49:18
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14714

[Bug c/14714] segfault when initializing a flexible array member using designated initializer

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-03-24 16:53 -------
This is a dup of bug 11527.

*** This bug has been marked as a duplicate of 11527 ***

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |DUPLICATE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14714