git log - crash and core dump

git version 1.8.2.1 crashes on my ArchLinux x86_64 on git log command
gdb bt is attached

git log | less
does not crash in same repo

I cannot share a repo for a debug purposes since it's private repo of
my employer
but I can perform any suitable tests on repo to help this bug to be fixed

#0  0x00007ffff722b3e6 in ____strtoull_l_internal () from /usr/lib/libc.so.6
#1  0x00000000004b31d4 in pp_user_info (pp=pp@entry=0x7fffffffd310,
what=what@entry=0x521379 "Author", sb=sb@entry=0x7fffffffd290,
    line=line@entry=0x7b3a45 "Ivan Lyapunov [off-list ref]-
<> 1354083115 +0400\ncommitter Ivan Lyapunov [off-list ref]
1354083115 +0400\n\n- small merge fixes",
encoding=encoding@entry=0x505400 "UTF-8") at pretty.c:441
#2  0x00000000004b533a in pp_header (sb=0x7fffffffd290,
msg_p=0x7fffffffd228, commit=0x7c1e10, encoding=0x505400 "UTF-8",
pp=0x7fffffffd310) at pretty.c:1415
#3  pretty_print_commit (pp=pp@entry=0x7fffffffd310,
commit=commit@entry=0x7c1e10, sb=sb@entry=0x7fffffffd290) at
pretty.c:1545
#4  0x00000000004a0b45 in show_log (opt=opt@entry=0x7fffffffd4d0) at
log-tree.c:683
#5  0x00000000004a1616 in log_tree_commit
(opt=opt@entry=0x7fffffffd4d0, commit=commit@entry=0x7c1e10) at
log-tree.c:859
#6  0x0000000000438b03 in cmd_log_walk (rev=rev@entry=0x7fffffffd4d0)
at builtin/log.c:310
#7  0x00000000004395dd in cmd_log (argc=1, argv=0x7fffffffdd30,
prefix=0x0) at builtin/log.c:582
#8  0x000000000040562d in run_builtin (argv=0x7fffffffdd30, argc=1,
p=0x754d18 <commands.21404+1080>) at git.c:282
#9  handle_internal_command (argc=1, argv=0x7fffffffdd30) at git.c:444
#10 0x0000000000404a6f in run_argv (argv=0x7fffffffdbd0,
argcp=0x7fffffffdbdc) at git.c:490
#11 main (argc=1, argv=0x7fffffffdd30) at git.c:565