str_to_utc function error

To be able to reproduce this bug, there must be local time when local date and UTC timezone date are different, for example, every day after 5:00 PM PST has say 18 of September, but UTC timezone has 00:00 AM 19 of September.

In these time frames run the following query:

select
clock_utc("2006-01-02T01:01:01") as utctime,
str_to_utc(clock_str("2006-01-02T01:01:01")) as converted_from_local_utc_time 

results will be, for example

[

{ "converted_from_local_utc_time": "2018-09-19T00:07:54.727", "utctime": "2018-09-19T00:07:54.727" }

]

Key feature - we have same date for both results.

Now run the following:

select
clock_utc("2006-01-02") as utctime,
str_to_utc(clock_str("2006-01-02")) as converted_from_local_utc_time

results will be for example:

[

{ "converted_from_local_utc_time": "2018-09-18", "utctime": "2018-09-19" }

]

Error - we have different dates for these results.