Seems that there is parser problem when using IN with a double "(())"

[winoros]

Please answer these questions before submitting your issue. Thanks!

1. What version of Go are you using (go version)?
   1.7.3

2. What operating system and processor architecture are you using (go env)?
   GOARCH="amd64"
   GOBIN="/usr/local/go/bin"
   GOEXE=""
   GOHOSTARCH="amd64"
   GOHOSTOS="linux"
   GOOS="linux"
   GOPATH="/root/gopkg"
   GORACE=""
   GOROOT="/usr/local/go"
   GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
   CC="gcc"
   GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build945606389=/tmp/go-build -gno-record-gcc-switches"
   CXX="g++"
   CGO_ENABLED="1"

3. What did you do?
   If possible, provide a recipe for reproducing the error.
   A complete runnable program is good.

DROP TABLE IF EXISTS t1;
DROP TABLE IF EXISTS t2;
DROP TABLE IF EXISTS t1xt2;

CREATE TABLE t1 (
  id_1 int(5) NOT NULL,
  t varchar(4) DEFAULT NULL
);

CREATE TABLE t2 (
  id_2 int(5) NOT NULL,
  t varchar(4) DEFAULT NULL
);

CREATE TABLE t1xt2 (
  id_1 int(5) NOT NULL,
  id_2 int(5) NOT NULL
);

INSERT INTO t1 VALUES (1, 'a'), (2, 'b'), (3, 'c'), (4, 'd');
INSERT INTO t2 VALUES (2, 'bb'), (3, 'cc'), (4, 'dd'), (12, 'aa');
INSERT INTO t1xt2 VALUES (2, 2), (3, 3), (4, 4);

SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN (SELECT t1xt2.id_2 FROM t1xt2 WHERE t1.id_1 = t1xt2.id_1));

SELECT DISTINCT t1.id_1 FROM t1 WHERE
(12 NOT IN ((SELECT t1xt2.id_2 FROM t1xt2 where t1.id_1 = t1xt2.id_1)));

4. What did you expect to see?

the result of two queries should be both

+------+
| id_1 |
+------+
| 1    |
| 2    |
| 3    |
| 4    |
+------+

5. What did you see instead?
   the first is the expected result;
   the second is:

+------+
| id_1 |
+------+
| 2    |
| 3    |
| 4    |
+------+