making Seq.elems **not** cache

gistfile1.txt

$ git diff
diff --git a/src/core.c/Seq.pm6 b/src/core.c/Seq.pm6
index edf58b6d6..93ac5504c 100644
--- a/src/core.c/Seq.pm6
+++ b/src/core.c/Seq.pm6
@@ -48,6 +48,18 @@ my class Seq is Cool does Iterable does Sequence {
         self.List.Capture
     }
 
+    method !count(--> Int:D) {
+        my int $count;
+        my $iter := $!iter;
+
+        nqp::until(
+          nqp::eqaddr($iter.pull-one,IterationEnd),
+          ++$count
+        );
+
+        $count
+    }
+
     method elems() {
         nqp::if(
           self.is-lazy,
@@ -55,7 +67,7 @@ my class Seq is Cool does Iterable does Sequence {
           nqp::if(
             nqp::isconcrete($!iter) && nqp::istype($!iter,PredictiveIterator),
             $!iter.count-only,
-            self.cache.elems
+            self!count
           )
         )
     }

gistfile2.txt

Test Summary Report
-------------------
t/spec/S02-types/capture.t                                      (Wstat: 65280 Tests: 32 Failed: 0)
  Non-zero exit status: 255
  Parse errors: Bad plan.  You planned 46 tests but ran 32.
t/spec/S02-types/pair.rakudo.moar                               (Wstat: 65280 Tests: 177 Failed: 0)
  Non-zero exit status: 255
  Parse errors: Bad plan.  You planned 182 tests but ran 177.
t/spec/S02-types/subset-6c.t                                    (Wstat: 256 Tests: 51 Failed: 1)
  Failed test:  13
  Non-zero exit status: 1
t/spec/S03-binding/hashes.t                                     (Wstat: 256 Tests: 39 Failed: 1)
  Failed test:  38
  Non-zero exit status: 1
t/spec/S02-types/subset-6e.t                                    (Wstat: 256 Tests: 60 Failed: 1)
  Failed test:  14
  Non-zero exit status: 1
t/spec/S03-sequence/arity-2-or-more.t                           (Wstat: 1024 Tes  Failed test:  9
  Non-zero exit status: 1
  Parse errors: Bad plan.  You planned 178 tests but ran 9.
t/spec/S16-io/words.t                                           (Wstat: 65280 Tests: 0 Failed: 0)
  Non-zero exit status: 255
  Parse errors: Bad plan.  You planned 11 tests but ran 0.
t/spec/S32-array/adverbs.t                                      (Wstat: 15360 Tests: 606 Failed: 60)
  Failed tests:  20, 22, 40, 42, 60, 62, 80, 82, 100, 102
                120, 122, 140, 142, 160, 162, 180, 182
                200, 202, 220, 222, 240, 242, 260, 262
                280, 282, 300, 302, 320, 322, 340, 342
                360, 362, 380, 382, 400, 402, 420, 422
                440, 442, 460, 462, 480, 482, 500, 502
                520, 522, 540, 542, 560, 562, 580, 582
                600, 602
  Non-zero exit status: 60
t/spec/S32-hash/slice.rakudo.moar                               (Wstat: 0 Tests: 31 Failed: 0)
  TODO passed:   15-22, 25-26
t/spec/S32-hash/adverbs.t                                       (Wstat: 28672 Tests: 1128 Failed: 112)
  Failed tests:  22, 24, 42, 44, 62, 64, 82, 84, 102, 104
                122, 124, 142, 144, 162, 164, 182, 184
                202, 204, 222, 224, 242, 244, 262, 264
                283-284, 302, 304, 322, 324, 342, 344, 362
                364, 382, 384, 402, 404, 422, 424, 442
                444, 462, 464, 482, 484, 502, 504, 522
                524, 542, 544, 563-564, 582, 584, 602, 604
                622, 624, 642, 644, 662, 664, 682, 684
                702, 704, 722, 724, 742, 744, 762, 764
                782, 784, 802, 804, 822, 824, 843-844, 862
                864, 882, 884, 902, 904, 922, 924, 942
                944, 962, 964, 982, 984, 1002, 1004, 1022
                1024, 1042, 1044, 1062, 1064, 1082, 1084
                1102, 1104, 1123-1124
  Non-zero exit status: 112
t/spec/S32-exceptions/misc2.rakudo.moar                         (Wstat: 256 Tests: 269 Failed: 1)
  Failed test:  47
  Non-zero exit status: 1
t/spec/S32-list/skip.t                                          (Wstat: 256 Tests: 27 Failed: 1)
  Failed test:  25
  Non-zero exit status: 1
t/spec/S32-num/cool-num.rakudo.moar                             (Wstat: 256 Tests: 46 Failed: 1)
  Failed test:  46
  Non-zero exit status: 1
t/spec/S32-str/split.rakudo.moar                                (Wstat: 256 Tests: 65 Failed: 1)
  Failed test:  57
  Non-zero exit status: 1
t/spec/S15-normalization/nfc-concat.t                           (Wstat: 65024 Tests: 1919 Failed: 1919)
  Failed tests:  1-1919
  Non-zero exit status: 254
t/spec/integration/advent2012-day14.t                           (Wstat: 15 Tests: 3 Failed: 0)
  Non-zero wait status: 15
  Parse errors: Bad plan.  You planned 6 tests but ran 3.
Files=1336, Tests=113510, 282 wallclock secs (38.20 usr 10.52 sys + 3522.86 cusr 355.16 csys = 3926.74 CPU)