Squirrel Mail crash with "PHP Fatal error: Call to undefined function sqimap_run_literal_command()"

I have encountered a bug on Squirrel Mail (version 1.4.8-21), the client's credentials are accepted but the page is then stucked on "webmail/src/redirect.php"

On the Apache side, I noticed the following PHP error :

  PHP Fatal error: Call to undefined function sqimap_run_literal_command() in /usr/share/squirrelmail/functions/imap_general.php on line 518  

After some debugging, I found out that Squirrel Mail does NOT properly handle specials characters; In this case I had an accent in the user password.
I reseted the user's password and everything went back to normal.

Hope that helps !