sqlglot.errors.ParseError when parsing DATE_SUB、DATE_ADD... function

[yiliang-neo]

hi.
There is a problem confuses me.
i use sqlglot==18.11.6.
when i run

sqlglot.parse("select date_sub(current_date(), 1);", "doris")

it raises a sqlglot.errors.ParseError, but the errors in sqlglot.errors.ParseError is empty: [].

i want to know if it is an error actually(i tested this sql in engine and it can be executed) and seek a advice about how to identify this non-errors error?

[tobymao]

if it crashes and it should run it’s an erorr