On Fri, 2008-01-18 at 19:04 -0500, Richard Platel wrote:

Hi

FETCHing a largish (~30K) zlib compressed maildir message causes an
assertion failure on an attempt to grow the stream buffer to smaller
than its current size.

I believe the attached patch fixes this.

I fixed it a bit differently: http://hg.dovecot.org/dovecot/rev/e33119f2dfdc

It was allocating more memory even though there was no need for it after compress.