MariaDB-Migrations hang when IF is multiline

[htto]

Which version and edition of Flyway are you using?

6.4.3 (broken since 6.4.1, assuming 9235c04)

Which client are you using? (Command-line, Java API, Maven plugin, Gradle plugin)

Flyway CLI Community

Which database are you using (type & version)?

mariadb Ver 15.1 Distrib 10.3.22-MariaDB, for debian-linux-gnu (x86_64) using readline 5.2

Which operating system are you using?

Distributor ID: Debian
Description: Debian GNU/Linux 10 (buster)
Release: 10
Codename: buster

What did you do?

cat database/V20200610_113700__flyway_bug.sql

IF
1 = 0
 THEN                                                                                                                   
    SELECT 1;
 ELSE
    SELECT 0;
END IF;   

What did you expect to see?

The same as with 'IF 1=0' on one line

DEBUG: Executing SQL: IF 1 = 0
 THEN                                                                                                                   
    SELECT 1;
 ELSE
    SELECT 0;
 END IF
+---+
| 0 |
+---+
| 0 |
+---+

What did you see instead?

Hang with

DEBUG: Parsing V20200610_113700__flyway_bug.sql ...

and hogging 150% CPU for me