No CRLF in Pigeonhole's header?

Hello,

I have been told on Freenode's #dovecot to ask here. I have Exim 4.92 complaining about "Non-CRLF-terminated header, under CHUNKING: message abandoned" with redirects made by Pigeonhole 0.5.5 (with Dovecot 2.3.5.1). Please find relevant part of the traffic below, and help me determine whether Exim is correct on this. 0x0000:  4500 0954 0000 4000 8006 0000 7f00 0001  E..T..@......... 0x0010:  7f00 0001 6ea2 0019 8982 e279 d090 b820  ....n......y.... 0x0020:  8018 021e 0749 0000 0101 080a c345 2b51  .....I.......E+Q 0x0030:  b382 853c 4d41 494c 2046 524f 4d3a 3c72 .....RCPT.TO: 0x0060:  3c63 6f6e 7461 6374 4072 6567 6973 2e74 ..BDAT.2254. 0x0080:  4c41 5354 0d0a 582d 5369 6576 653a 2050  LAST..X-Sieve:.P 0x0090:  6967 656f 6e68 6f6c 6520 5369 6576 6520  igeonhole.Sieve. 0x00a0:  302e 352e 3520 2832 3438 3362 3038 3529  0.5.5.(2483b085) 0x00b0:  0a58 2d53 6965 7665 2d52 6564 6972 6563  .X-Sieve-Redirec 0x00c0:  7465 642d 4672 6f6d 3a20 7240 7330 662e  ted-From:.r@sxf.

With Dovecot 2.2.36 + Pigeonhole 0.4.24.1 and required minimum of version-related configuration changes - redirection works properly. Related Exim code fragment: https://github.com/Exim/exim/blob/master/src/src/receive.c#L2222

Thank you,

Wojtek Sychut