[Bug c/86670] unsized static array var is removed but still accessed.

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86670

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-07-25
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  The decl becomes

 <var_decl 0x7ffff7fefe10 a
    type <array_type 0x7ffff69bf738
        type <integer_type 0x7ffff68a75e8 int public SI
            size <integer_cst 0x7ffff688ff30 constant 32>
            unit-size <integer_cst 0x7ffff688ff48 constant 4>
            align:32 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x7ffff68a75e8 precision:32 min <integer_cst 0x7ffff688fee8 -2147483648> max
<integer_cst 0x7ffff688ff00 2147483647>
            pointer_to_this <pointer_type 0x7ffff68afa80>>
        BLK
        align:32 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x7ffff69bf738>
    used static external read preserve BLK defer-output t.c:1:12
    align:32 warn_if_not_align:0
    attributes <tree_list 0x7ffff69bc780
        purpose <identifier_node 0x7ffff69cfe10 used>>>

so is STATIC EXTERNAL.  That means somehow grokdeclarator goes wrong.