[Bug c++/60332] New: [c++1y] ICE with auto in function-pointer cast

[reichelt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60332

            Bug ID: 60332
           Summary: [c++1y] ICE with auto in function-pointer cast
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, lto
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: reichelt at gcc dot gnu.org

The following valid(?) code snippet (compiled with "-std=c++1y -flto")
triggers an ICE on trunk:

=================================================================================
void foo();

auto f = (auto(*)())(&foo);
=================================================================================

bug.cc:3:27: internal compiler error: tree code 'template_type_parm' is not
supported in LTO streams
 auto f = (auto(*)())(&foo);
                           ^
0xaba08d DFS_write_tree
        ../../gcc/gcc/lto-streamer-out.c:1300
0xab941f DFS_write_tree_body
        ../../gcc/gcc/lto-streamer-out.c:476
0xab941f DFS_write_tree
        ../../gcc/gcc/lto-streamer-out.c:1208
0xab941f DFS_write_tree_body
        ../../gcc/gcc/lto-streamer-out.c:476
0xab941f DFS_write_tree
        ../../gcc/gcc/lto-streamer-out.c:1208
0xab941f DFS_write_tree_body
        ../../gcc/gcc/lto-streamer-out.c:476
0xab941f DFS_write_tree
        ../../gcc/gcc/lto-streamer-out.c:1208
0xabb727 lto_output_tree(output_block*, tree_node*, bool, bool)
        ../../gcc/gcc/lto-streamer-out.c:1390
0xab5aef write_global_stream
        ../../gcc/gcc/lto-streamer-out.c:2100
0xabd99e lto_output_decl_state_streams
        ../../gcc/gcc/lto-streamer-out.c:2144
0xabd99e produce_asm_for_decls()
        ../../gcc/gcc/lto-streamer-out.c:2429
0xaffe4f write_lto
        ../../gcc/gcc/passes.c:2297
0xb02ec0 ipa_write_summaries_1
        ../../gcc/gcc/passes.c:2356
0xb02ec0 ipa_write_summaries()
        ../../gcc/gcc/passes.c:2413
0x891cf7 ipa_passes
        ../../gcc/gcc/cgraphunit.c:2078
0x891cf7 compile()
        ../../gcc/gcc/cgraphunit.c:2174
0x892224 finalize_compilation_unit()
        ../../gcc/gcc/cgraphunit.c:2329
0x68deee cp_write_global_declarations()
        ../../gcc/gcc/cp/decl2.c:4449
Please submit a full bug report, [etc.]