queries return random data when they have inline comments

Alpha customer reported following issue:

We continue to do testing, actively, with the ColumnStore engine… and our tools place in-line comments in some of the queries.
If you place inline comments in the queries, random data is returned, so I suspect there’s a bug within the parsing of the query strings?

Removing the inline comments results in successful querying of data.

example:

Before:
SELECT
d.*,
c.cause_name
FROM gbd.output_epi_multi_year_v263 d
LEFT JOIN shared.cause_hierarchy ch ON ch.cause_id = d.cause_id
LEFT JOIN shared.cause c ON c.cause_id = d.cause_id
WHERE measure_id = 5 – prevalence
AND year_start_id = 1990
AND year_end_id = 2015
AND location_id = 160
AND metric_id = 2 – percent
AND sex_id = 3 – both sexes
AND age_group_id = 22 – all ages
AND ch.level = 2 – cause hierarchy level 1
ORDER BY val ASC – lowest to highest values
LIMIT 1

After:
SELECT
d.*,
c.cause_name
FROM gbd.output_epi_multi_year_v263 d
LEFT JOIN shared.cause_hierarchy ch ON ch.cause_id = d.cause_id
LEFT JOIN shared.cause c ON c.cause_id = d.cause_id
WHERE measure_id = 5
AND year_start_id = 1990
AND year_end_id = 2015
AND location_id = 160
AND metric_id = 2
AND sex_id = 3
AND age_group_id = 22
AND ch.level = 2
ORDER BY val ASC
LIMIT 1