[Bug c/34308] New: gcc internal error (seg fault) (program cc1) with ill formed foo.c

[Bug c/34308] New: gcc internal error (seg fault) (program cc1) with ill formed foo.c

[dominique dot pelle at free dot fr]

gcc gives an internal error when compiling a source
file which contains _lots_ of stars '*' (pointer of pointer
of pointer etc.)  The source file looks admitedly silly but
it should not cause gcc to segfault.

This bug was filed in Ubuntu bug database:

  https://bugs.launchpad.net/ubuntu/+source/gcc-4.1/+bug/172326

Steps to reproduce bug:

1/ download test-case-crash-gcc.c (stand alone, no #include files)

   $ wget http://dominique.pelle.free.fr/test-case-crash-gcc.c

2/ compile it and observe an internal error, segfault:

   $ gcc test-case-crash-gcc.c 
   gcc: Internal error: Segmentation fault (program cc1)
   Please submit a full bug report.
   See <URL:http://gcc.gnu.org/bugs.html> for instructions.
   For Debian GNU/Linux specific bug reporting instructions, see
   <URL:file:///usr/share/doc/gcc-4.1/README.Bugs>.


   $ gcc -V 4.2 test-case-crash-gcc.c 
   i486-linux-gnu-gcc-4.2: Internal error: Segmentation fault (program cc1)
   Please submit a full bug report.
   See <URL:http://gcc.gnu.org/bugs.html> for instructions.
   For Debian GNU/Linux specific bug reporting instructions, see
   <URL:file:///usr/share/doc/gcc-4.2/README.Bugs>.


I could reproduce this bug with 2 versions of gcc
that I have on my Ubunto laptop: gcc-4.1.3 and gcc-4.2.1:

$ gcc --version
gcc (GCC) 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ gcc -V 4.2 --version
i486-linux-gnu-gcc-4.2 (GCC) 4.2.1 (Ubuntu 4.2.1-5ubuntu4)
Copyright (C) 2007 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

I'm using Linux-2.6.20 (x86) (Ubuntu Gutsy).


-- 
           Summary: gcc internal error (seg fault) (program cc1) with ill
                    formed foo.c
           Product: gcc
           Version: 4.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dominique dot pelle at free dot fr


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34308

[Bug c/34308] gcc internal error (seg fault) (program cc1) with ill formed foo.c

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2007-12-01 11:38 -------
This is just the standard recursive decendent parser issue.  if you have a lot
of levels, it will crash at some point.  I don't think this bug can be fixed. 
Try increasing the stack size and you will see it no longer crashes.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34308

[Bug c/34308] gcc internal error (seg fault) (program cc1) with ill formed foo.c

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2007-12-15 20:46 -------
There are too many pointers here for a recursive decent parser to handle.  This
is common and really just hard to do correctly.

*** This bug has been marked as a duplicate of 31804 ***


-- 

pinskia at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34308