[Exim] Segmentation fault in Exim 4.04

open("/var/spool/exim/input//17AVUC-0007Qg-00-J", O_WRONLY|O_APPEND|O_CREAT, 064

0) = 6
shmat(6, 0x80c98b0, 0x1ptrace: umoven: Input/output error
)                = ?
shmat(6, 0x80c98b0, 0x2ptrace: umoven: Input/output error
)                = ?
ipc_subcall(0x6, 0x1f5, 0xc, 0xc)       = 0
fchmod(6, 0640)                         = 0
--- SIGSEGV (Segmentation fault) ---
+++ killed by SIGSEGV +++

This happens with some mails when exim -q oder exim -M tries to
deliver. Please tell which information you need to trace this.

Thanks,
Marc