[Bug c/79730] New: ICE tree check: expected var_decl, have function_decl in finish_decl, at c/c-decl.c:5063

["gerhard dot steinmetz dot fortran at t-online dot de" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79730

            Bug ID: 79730
           Summary: ICE tree check: expected var_decl, have function_decl
                    in finish_decl, at c/c-decl.c:5063
           Product: gcc
           Version: 7.0.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gerhard.steinmetz.fortran@t-online.de
  Target Milestone: ---

Affects versions down to 4.9 (configured with --enable-checking=yes) :


$ cat z1.c
register int x() asm ("x");

$ cat z2.c
register float x() asm ("x()");


$ gcc-7-20170226 -c z1.c
z1.c:1:14: error: invalid storage class for function 'x'
 register int x() asm ("x");
              ^
z1.c:1:1: internal compiler error: tree check: expected var_decl, have
function_decl in finish_decl, at c/c-decl.c:5063
 register int x() asm ("x");
 ^~~~~~~~
0xea2fcc tree_check_failed(tree_node const*, char const*, int, char const*,
...)
        ../../gcc/tree.c:9815
0x668f71 tree_check(tree_node*, char const*, int, char const*, tree_code)
        ../../gcc/tree.h:3064
0x668f71 finish_decl(tree_node*, unsigned int, tree_node*, tree_node*,
tree_node*)
        ../../gcc/c/c-decl.c:5063
0x6cf8b6 c_parser_declaration_or_fndef
        ../../gcc/c/c-parser.c:1971
0x6d87fb c_parser_external_declaration
        ../../gcc/c/c-parser.c:1468
0x6d9259 c_parser_translation_unit
        ../../gcc/c/c-parser.c:1348
0x6d9259 c_parse_file()
        ../../gcc/c/c-parser.c:18173
0x737b02 c_common_parse_file()
        ../../gcc/c-family/c-opts.c:1107