[Bug c/21921] New: internal compiler error: in tsi_link_before, at tree-iterator.c:113

["p dot van-hoof at qub dot ac dot uk" <gcc-bugzilla at gcc dot gnu dot org>]

When the attached code is compiled as follows, an ICE will result:

dogbert> gcc -O1 -funsafe-math-optimizations -c h.c
h.c: In function ?Q?:
h.c:10: internal compiler error: in tsi_link_before, at tree-iterator.c:113
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
dogbert> gcc -v
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/usr/local/gcc410
--enable-languages=c,c++,f95
Thread model: posix
gcc version 4.1.0 20050605 (experimental)

This bug only appears on the mainline, but not in any of the release branches.

-- 
           Summary: internal compiler error: in tsi_link_before, at tree-
                    iterator.c:113
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: p dot van-hoof at qub dot ac dot uk
                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=21921