Crash: assign to pointer to incomplete enum

[ehaas]

void foo(void) {
   int x;
   enum E *ptr = &x;
}

panic: reached unreachable code
/Users/ehaas/source/arocc/src/aro/Type.zig:1317:17: 0x10e7e3f95 in integerRank (arocc)
        else => unreachable,
                ^
/Users/ehaas/source/arocc/src/aro/Type.zig:1324:22: 0x10e8ee58d in sameRankDifferentSign (arocc)
    if (a.integerRank(comp) != b.integerRank(comp)) return false;
                     ^
/Users/ehaas/source/arocc/src/aro/Parser.zig:6122:87: 0x10e877c6e in coerceExtra (arocc)
                const different_sign_only = unqual_ty.elemType().sameRankDifferentSign(res.ty.elemType(), p.comp);
                                                                                      ^
/Users/ehaas/source/arocc/src/aro/Parser.zig:6055:31: 0x10e8b68a7 in coerce (arocc)
        return res.coerceExtra(p, dest_ty, tok, c) catch |er| switch (er) {
                              ^