[Dovecot] fts_squat hanging on some messages

Hello,

I recently upgraded to dovecot 2.0.2 (on gentoo ~amd64) and now fts_squat's index building seems to hang for some of my mailboxes. The imap process gets stuck at 100% cpu usage and dovecot.index.search is never touched.

I traced the problem to a message (attached) for one of the problematic mailboxes. Also attached are a full backtrace and the output of dovecot -n.

The problem is reproducible: step 1) /usr/libexec/dovecot/imap step 2) . select Junk step 3) . search body sometext