Dear Maintainer,
Upgraded my Odroid-HC1 ARM device from Debian 12 -> Debian 13 and Exim
stopped delivering (receiving) email with SEGV:
```
18:09:29 7887 appendfile: mode=600 notify_comsat=0 quota=0 warning=0
18:09:29 7887 directory=/home/vmail/example.com/username/Maildir format=maildir
18:09:29 7887 message_prefix=null
18:09:29 7887 message_suffix=null
18:09:29 7887 maildir_use_size_file=no
18:09:29 7887 ensuring maildir directories exist in /home/vmail/example.com/username/Maildir
18:09:29 7887 delivering in maildir format in /home/vmail/example.com/username/Maildir
18:09:29 7887 try option 'maildir_tag'
18:09:29 7887 LOG: MAIN PANIC
18:09:29 7887 SIGSEGV (deliberate trap)
2026-09-26 18:09:29 1xASkY-000000001wE-0V64 SIGSEGV (deliberate trap)
18:09:29 7884 LOG: MAIN PANIC
18:09:29 7884 failed to read delivery status for username@example.com from delivery subprocess
18:09:29 7884 LOG: MAIN PANIC
```
Manged to get backtrace with GDB:
```
#1 0x0057d0b4 in string_vformat_trc (g=<optimized out>, g@entry=0x0, func=func@entry=0x61a23c <__FUNCTION__.2> "appendfile_transport_entry", line=line@entry=2475, size_limit=size_limit@entry=32768, flags=<optimized out>, flags@entry=3, format=<optimized out>, format@entry=0x607af8 "%lld.M%luP%d.%s", ap=..., ap@entry=...) at string.c:1778
length = <optimized out>
slen = <optimized out>
nptr = 0x22c8
item_start = <optimized out>
s = 0x22ce <error: Cannot access memory at address 0x22ce>
newformat = "%d\000\000\000\237\361\276D\360c\000|\000\000"
l_align = 0 '\000'
null = <optimized out>
gp = 0x2184901 ""
L_NORMAL = L_NORMAL
L_SHORT = L_SHORT
L_LONG = L_LONG
L_LONGLONG = L_LONGLONG
L_LONGDOUBLE = L_LONGDOUBLE
L_SIZE = L_SIZE
taint_checked = 1 '\001'
width = -1
precision = -1
initial_off = <optimized out>
lim = 127
need = <optimized out>
fp = 0x607b07 ""
__FUNCTION__ = "string_vformat_trc"
#2 0x0057d826 in string_sprintf_trc (format=format@entry=0x607af8 "%lld.M%luP%d.%s", func=func@entry=0x61a23c <__FUNCTION__.2> "appendfile_transport_entry", line=<optimized out>) at string.c:747
g = 0x0
flags = 3
ap = {
__ap = 0xbef19ffc
}
__FUNCTION__ = "string_sprintf_trc"
#3 0x0059fc0a in appendfile_transport_entry (tblock=0x212d754, addr=0x217fbcc) at appendfile.c:2475
basename = <optimized out>
i = 1
check_path = <optimized out>
re = <optimized out>
ob = 0x212d7f4
trname = 0x213eeb8 "dovecot_transport"
statbuf = {
st_dev = 44826983,
st_ino = 4295000484,
st_mode = 0,
st_nlink = 0,
st_uid = 0,
st_gid = 0,
st_rdev = 67084,
st_size = 4096,
st_blksize = 136,
st_blocks = 1790424337,
st_atim = {
tv_sec = -5298298788879578396,
tv_nsec = 0
},
st_mtim = {
tv_sec = -5298298791948976128,
tv_nsec = -1225641240
},
st_ctim = {
tv_sec = -5387405881438633984,
tv_nsec = 35001544
}
}
fdname = <optimized out>
deliver_dir = <optimized out>
filename = <optimized out>
hitchname = 0x0
dataname = <optimized out>
lockname = 0x0
newname = <optimized out>
nametag = 0x0
cr = 0x60f484 ""
filecount_msg = 0x60f484 ""
path = <optimized out>
times = {
actime = -5264410814043121969,
modtime = 2053
}
msg_tv = {
tv_sec = 1790435780,
tv_usec = 915461
}
disable_quota = <optimized out>
isdirectory = <optimized out>
isfifo = 0 '\000'
wait_for_tick = 0 '\000'
uid = 993
gid = 993
mbformat = 3
mode = <optimized out>
saved_size = -1
mailbox_size = <optimized out>
mailbox_filecount = -1
hd = -1
fd = <optimized out>
yield = 2
i = <optimized out>
save_fd = 0
mbx_lockfd = -1
mbx_lockname = "\004\000\000\000\004\000\000\000T\327\022\002", '\000' <repeats 16 times>, "\341\003\000\000\006\000\000\000\020\000\000"
temp_file = 0x0
maildirsize_fd = <optimized out>
maildir_save_errno = <optimized out>
__FUNCTION__ = "appendfile_transport_entry"
#4 0x00527b64 in deliver_local (addr=addr@entry=0x217fbcc, shadowing=shadowing@entry=0 '\000') at deliver.c:2412
ti = 0x212d63c
ok = <optimized out>
replicate = 1 '\001'
rl = {
rlim_cur = 0,
rlim_max = 0
}
use_initgroups = 0 '\000'
uid = 993
gid = 993
status = 35144964
len = <optimized out>
rc = <optimized out>
pfd = {8, 9}
pid = <optimized out>
working_directory = 0x5d53bc "/"
addr2 = <optimized out>
tp = <optimized out>
trname = 0x213eeb8 "dovecot_transport"
__FUNCTION__ = "deliver_local"
#5 0x005280e4 in do_local_deliveries () at deliver.c:3049
deliver_time = {
tv_sec = 455301678012,
tv_usec = 28132658559057920
}
addr3 = 0x217fbcc
logflags = 1
logchar = <optimized out>
tpt_dummy = 0x0
nextaddr = <optimized out>
delivery_start = {
tv_sec = 1790435780,
tv_usec = 816966
}
addr2 = <optimized out>
tp = 0x212d754
serialize_key = 0x0
trname = <optimized out>
addr = <optimized out>
dbblock = {
dbptr = 0x41,
lockfd = 6544944,
readonly = 0 '\000'
}
dbm_file = <optimized out>
now = <optimized out>
__FUNCTION__ = "do_local_deliveries"
#6 0x0052a9c8 in deliver_message (id=<optimized out>, forced=forced@entry=1 '\001', give_up=give_up@entry=0 '\000') at deliver.c:8446
i = <optimized out>
rc = <optimized out>
final_yield = 0
process_recipients = <optimized out>
now = <optimized out>
addr_last = <optimized out>
filter_message = 0x0
info = <optimized out>
dbblock = {
dbptr = 0x2133ca8,
lockfd = -1,
readonly = 0 '\000'
}
dbm_file = <optimized out>
has_privs = <optimized out>
reset_point = <optimized out>
__FUNCTION__ = "deliver_message"
#7 0x0050c40a in main (argc=<optimized out>, cargv=<optimized out>) at exim.c:5151
status = 15523
pid = <optimized out>
argv = <optimized out>
arg_receive_timeout = -1
arg_smtp_receive_timeout = -1
arg_error_handling = 0
filter_sfd = -1
filter_ufd = -1
group_count = <optimized out>
i = 3
rv = <optimized out>
list_queue_option = <optimized out>
msg_action = <optimized out>
msg_action_arg = <optimized out>
namelen = <optimized out>
queue_only_reason = 0
rcpt_dsn_flags = <optimized out>
recipients_arg = <optimized out>
sender_address_domain = 0
test_retry_arg = <optimized out>
test_rewrite_arg = <optimized out>
perl_start_option = <optimized out>
original_egid = <optimized out>
admin_only_arg = <optimized out>
arg_queue_only = <optimized out>
bi_option = <optimized out>
checking = <optimized out>
count_queue = <optimized out>
extract_recipients = <optimized out>
flag_G = <optimized out>
flag_n = <optimized out>
forced_delivery = 1 '\001'
f_end_dot = <optimized out>
deliver_give_up = <optimized out>
list_queue = <optimized out>
list_options = <optimized out>
list_config = <optimized out>
local_queue_only = <optimized out>
one_msg_action = <optimized out>
opt_D_used = <optimized out>
queue_only_set = <optimized out>
receiving_message = <optimized out>
sender_ident_set = <optimized out>
session_local_queue_only = <optimized out>
unprivileged = <optimized out>
removed_privilege = 0 '\000'
usage_wanted = <optimized out>
verify_address_mode = <optimized out>
verify_as_sender = <optimized out>
rcpt_verify_quota = <optimized out>
version_printed = <optimized out>
alias_arg = <optimized out>
called_as = <optimized out>
cmdline_syslog_name = <optimized out>
start_queue_run_id = <optimized out>
stop_queue_run_id = <optimized out>
expansion_test_message = <optimized out>
ftest_domain = <optimized out>
ftest_localpart = <optimized out>
ftest_prefix = <optimized out>
ftest_suffix = <optimized out>
malware_test_file = <optimized out>
real_sender_address = <optimized out>
log_oneline = <optimized out>
originator_home = 0x5d53bc "/"
sz = <optimized out>
pw = 0x6807cc <pwcache>
statbuf = {
st_dev = 21,
st_ino = 5,
st_mode = 8576,
st_nlink = 1,
st_uid = 0,
st_gid = 5,
st_rdev = 34818,
st_size = 0,
st_blksize = 1024,
st_blocks = 0,
st_atim = {
tv_sec = 1790435699,
tv_nsec = 0
},
st_mtim = {
tv_sec = 1790435699,
tv_nsec = 0
},
st_ctim = {
tv_sec = 1790433725,
tv_nsec = 319048639
}
}
passed_qr_pid = <optimized out>
passed_qr_pipe = <optimized out>
group_list = <error reading variable group_list (value requires 262144 bytes, which is more than max-value-size)>
info_flag = <optimized out>
info_stdout = <optimized out>
rsopts = {0x5e8a60 "f", 0x60c208 "ff", 0x6077ac "r", 0x5ddaa8 "rf", 0x5ddaac "rff"}
__FUNCTION__ = "main"
r0 0x22ce 8910
r1 0x22c8 8904
r2 0x22ce 8910
r3 0xbef1a014 3203506196
r4 0x6 6
r5 0x607b06 6322950
r6 0x0 0
r7 0xffffffff 4294967295
r8 0xffffffff 4294967295
r9 0x2184901 35145985
r10 0x21848bc 35145916
r11 0x73 115
r12 0xffffffff 4294967295
sp 0xbef19f08 0xbef19f08
lr 0x57d0b5 5755061
pc 0xb67e39ee 0xb67e39ee <__GI_strlen+174>
cpsr 0x20070030 537329712
fpscr 0x80000010 -2147483632
=> 0xb67e39ee <__GI_strlen+174>: ldrd r2, r3, [r1]
```
Looks like issue is that format "%lld.M%luP%d.%s" expects 32bit integer on 32bit armhf while msg_tv.tv_usec is 64bit.