[Bug c++/71988] New: [7 Regression] ICE in dump_simple_decl (gcc/cp/error.c:965)

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71988

            Bug ID: 71988
           Summary: [7 Regression] ICE in dump_simple_decl
                    (gcc/cp/error.c:965)
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---

Hello.

Starting from r238558, we ICE in the following command:

$ g++ -fdump-ipa-cgraph tc.ii

c1plus: internal compiler error: Segmentation fault
0x115f024 crash_signal
        ../../gcc/toplev.c:335
0x92d8c1 dump_simple_decl
        ../../gcc/cp/error.c:965
0x92e4f2 dump_decl
        ../../gcc/cp/error.c:1071
0x937289 decl_as_string(tree_node*, int)
        ../../gcc/cp/error.c:2880
0x937361 lang_decl_name(tree_node*, int, bool)
        ../../gcc/cp/error.c:2914
0xa38962 cxx_printable_name_internal
        ../../gcc/cp/tree.c:2165
0xa38ba9 cxx_printable_name(tree_node*, int)
        ../../gcc/cp/tree.c:2201
0xc0a369 symtab_node::name() const
        ../../gcc/symtab.c:523
0xc0a268 symtab_node::asm_name() const
        ../../gcc/symtab.c:507
0xc278eb analyze_functions
        ../../gcc/cgraphunit.c:1044
0xc2c2c6 symbol_table::finalize_compilation_unit()
        ../../gcc/cgraphunit.c:2545

where
$ cat tc.ii

struct A
{
} constexpr a;