[Bug c/68668] New: [6 Regression] bogus error: invalid use of array with unspecified bounds

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68668

            Bug ID: 68668
           Summary: [6 Regression] bogus error: invalid use of array with
                    unspecified bounds
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: trippels at gcc dot gnu.org
  Target Milestone: ---

% cat vp8_dx_iface.i
typedef const int vp8_tree[];
int fn1(vp8_tree p1) { return p1[0]; }

 % gcc -c vp8_dx_iface.i
vp8_dx_iface.i: In function ‘fn1’:
vp8_dx_iface.i:2:1: error: invalid use of array with unspecified bounds
 int fn1(vp8_tree p1) { return p1[0]; }
 ^~~