Unexpected Results when Comparing Boolean with Floating-point

Considering the test case below:

The third `SELECT` returns an empty result, which is surprising: If the result of second query is -0.4 (`TRUE`), the value of the `true - c1/10` in `WHERE` condition should also be true, and thus the third query should return the row in `t0`.

CREATE TABLE t0(c1 INT);

INSERT INTO t0(c1) VALUES (14);

SELECT * FROM t0; -- 14

SELECT true-c1/10 FROM t0; -- -0.4000

SELECT * FROM t0 WHERE true-c1/10; 

-- Expected: 14

-- Actual: empty

I originally find this in the latest docker image.