rawlog with -i not worked

[Hardy Flor]

Hello,

I have the rawlog enabled according to the 
manual:http://wiki2.dovecot.org/Debugging/Rawlog

Without -i everything is wonderful, a coredump is with the -i parameter 
created


****************************************
service imap-postlogin {
   executable = script-login -d rawlog -i
   user = vmail
}
****************************************
GNU gdb (GDB) 7.4.1-debian
Copyright (C) 2012 Free Software Foundation, Inc.
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This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/lib/dovecot/rawlog...(no debugging symbols 
found)...done.
[New LWP 29312]

warning: Can't read pathname for load map: Eingabe-/Ausgabefehler.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/lib/dovecot/rawlog -i 
/usr/lib/dovecot/script-login'.
Program terminated with signal 11, Segmentation fault.
#0  0x00007f66bd2fe6c7 in master_instance_list_find_by_name () from 
/usr/lib/dovecot/libdovecot.so.0
(gdb) bt full
#0  0x00007f66bd2fe6c7 in master_instance_list_find_by_name () from 
/usr/lib/dovecot/libdovecot.so.0
No symbol table info available.
#1  0x00007f66bd300ea5 in master_service_parse_option () from 
/usr/lib/dovecot/libdovecot.so.0
No symbol table info available.
#2  0x00007f66bd300fd4 in master_getopt () from 
/usr/lib/dovecot/libdovecot.so.0
No symbol table info available.
#3  0x0000000000401e15 in main ()
No symbol table info available.
(gdb)