[Bug c++/43630] New: [4.3/4.4/4.5 Regression] ICE: SIGSEGV with invalid template specialization

["zsojka at seznam dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

Command line:
g++ testcase.C

Tested revisions:
r157877 - crash
4.4 r157895 - crash
4.3.4 - crash (bails out, no checking)
3.4.6 - crash (bails out, no checking)
3.3.6 - OK (no checking)

Valgrind output:
$ valgrind -q --trace-children=yes /mnt/svn/gcc-trunk/binary-157877-lto/bin/g++
testcase.C
testcase.C:3:30: error: template parameters not used in partial specialization:
testcase.C:3:30: error:         '<template-parameter-1-1>'
==5113== Invalid read of size 8
==5113==    at 0x785580: size_binop_loc (fold-const.c:2157)
==5113==    by 0x7D83FA: gimplify_compound_lval (gimplify.c:1987)
==5113==    by 0x7D3BCF: gimplify_expr (gimplify.c:6569)
==5113==    by 0x7E71C9: gimplify_modify_expr (gimplify.c:4460)
==5113==    by 0x7D4B34: gimplify_expr (gimplify.c:6614)
==5113==    by 0x7DB326: gimplify_stmt (gimplify.c:5264)
==5113==    by 0x7DBD32: gimplify_and_add (gimplify.c:391)
==5113==    by 0x7DCCDC: gimplify_return_expr (gimplify.c:1241)
==5113==    by 0x7D41CE: gimplify_expr (gimplify.c:6763)
==5113==    by 0x7DB326: gimplify_stmt (gimplify.c:5264)
==5113==    by 0x7E7FFA: gimplify_body (gimplify.c:7523)
==5113==    by 0x7E83E4: gimplify_function_tree (gimplify.c:7619)
==5113==  Address 0x10 is not stack'd, malloc'd or (recently) free'd
==5113==
testcase.C: In member function 'int A<int>::f()':
testcase.C:11:10: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


-- 
           Summary: [4.3/4.4/4.5 Regression] ICE: SIGSEGV with invalid
                    template specialization
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: zsojka at seznam dot cz
  GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: x86_64-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43630