Hi. (I am sorry but I am not sure if it's appropriate place to ask about bug)
I've tested on 2.1.214. If the multibyte space was passed as argument, the database hangs(never return any errors).
sql> select floor( );
Error: org.h2.jdbc.JdbcSQLSyntaxErrorException: Syntax error in SQL statement "select floor( [*])"; expected "INTERSECTS (, NOT, EXISTS, UNIQUE, INTERSECTS"; SQL statement:
select floor( ) [42001-214]
sql> select floor( );
(Hang up here)