[Bug regression/21898] New: Segmentation fault on testsuite case gcc.dg/20020425-1.c

["e9925248 at stud4 dot tuwien dot ac dot at" <gcc-bugzilla at gcc dot gnu dot org>]

$./cc1 t2.c
 {GC 767k -> 688k} foo
Segmentation fault
$cat t2.c
/* PR c/2161: parser stack overflow.  */
/* { dg-do compile } */

#define ONE     else if (0) { }
#define TEN     ONE ONE ONE ONE ONE ONE ONE ONE ONE ONE
#define HUN     TEN TEN TEN TEN TEN TEN TEN TEN TEN TEN
#define THOU    HUN HUN HUN HUN HUN HUN HUN HUN HUN HUN

void foo()
{
  if (0) { }
  /* 11,000 else if's.  */
  THOU THOU THOU THOU THOU THOU THOU THOU THOU THOU THOU
}

$./cc1 --version
GNU C version 4.1.0 20050603 (experimental) (i686-pc-linux-gnu)
        compiled by GNU C version 4.1.0 20050302 (experimental).
GGC heuristics: --param ggc-min-expand=0 --param ggc-min-heapsize=0

Older version do not have this problem:
$gcc -c t2.c
$gcc --version
gcc (GCC) 4.1.0 20050302 (experimental)
Copyright (C) 2005 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.

-- 
           Summary: Segmentation fault on testsuite case gcc.dg/20020425-1.c
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: regression
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: e9925248 at stud4 dot tuwien dot ac dot at
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21898