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Description of problem: git crash when format-patch with --cover-letter Version-Release number of selected component (if applicable): git-1.7.1-3.el6_4.1.x86_64 How reproducible: Steps to Reproduce: 1. $ git format-patch -2 --cover-letter 0000-cover-letter.patch *** glibc detected *** git: double free or corruption (fasttop): 0x0000000000b8b890 *** ======= Backtrace: ========= /lib64/libc.so.6[0x32b0676156] git[0x489785] git[0x4b61e8] git[0x456db2] git[0x4337e7] git[0x4041a1] git[0x404382] /lib64/libc.so.6(__libc_start_main+0xfd)[0x32b061ed1d] git[0x403ba9] ======= Memory map: ======== 00400000-00510000 r-xp 00000000 08:01 1719075 /usr/bin/git 00710000-00716000 rw-p 00110000 08:01 1719075 /usr/bin/git 00716000-00761000 rw-p 00000000 00:00 0 00b73000-00bc5000 rw-p 00000000 00:00 0 [heap] 32b0200000-32b0220000 r-xp 00000000 08:01 2243781 /lib64/ld-2.12.so 32b041f000-32b0420000 r--p 0001f000 08:01 2243781 /lib64/ld-2.12.so 32b0420000-32b0421000 rw-p 00020000 08:01 2243781 /lib64/ld-2.12.so 32b0421000-32b0422000 rw-p 00000000 00:00 0 32b0600000-32b078b000 r-xp 00000000 08:01 2243782 /lib64/libc-2.12.so 32b078b000-32b098a000 ---p 0018b000 08:01 2243782 /lib64/libc-2.12.so 32b098a000-32b098e000 r--p 0018a000 08:01 2243782 /lib64/libc-2.12.so 32b098e000-32b098f000 rw-p 0018e000 08:01 2243782 /lib64/libc-2.12.so 32b098f000-32b0994000 rw-p 00000000 00:00 0 32b0e00000-32b0e17000 r-xp 00000000 08:01 2243784 /lib64/libpthread-2.12.so 32b0e17000-32b1017000 ---p 00017000 08:01 2243784 /lib64/libpthread-2.12.so 32b1017000-32b1018000 r--p 00017000 08:01 2243784 /lib64/libpthread-2.12.so 32b1018000-32b1019000 rw-p 00018000 08:01 2243784 /lib64/libpthread-2.12.so 32b1019000-32b101d000 rw-p 00000000 00:00 0 32b1600000-32b1615000 r-xp 00000000 08:01 2243789 /lib64/libz.so.1.2.3 32b1615000-32b1814000 ---p 00015000 08:01 2243789 /lib64/libz.so.1.2.3 32b1814000-32b1815000 r--p 00014000 08:01 2243789 /lib64/libz.so.1.2.3 32b1815000-32b1816000 rw-p 00015000 08:01 2243789 /lib64/libz.so.1.2.3 32baa00000-32baa16000 r-xp 00000000 08:01 2243797 /lib64/libgcc_s-4.4.7-20120601.so.1 32baa16000-32bac15000 ---p 00016000 08:01 2243797 /lib64/libgcc_s-4.4.7-20120601.so.1 32bac15000-32bac16000 rw-p 00015000 08:01 2243797 /lib64/libgcc_s-4.4.7-20120601.so.1 7f4f54aa8000-7f4f54e87000 r--p 00000000 08:07 2621468 /home/ryan/workspace/virt/libvirt/.git/objects/pack/pack-9ce3154d1a64b1f2d3fea8a74783ee436515b959.idx 7f4f54e87000-7f4f54e8a000 rw-p 00000000 00:00 0 7f4f54e90000-7f4f54e93000 rw-p 00000000 00:00 0 7f4f54e93000-7f4f54e97000 r--p 00000000 08:07 2621882 /home/ryan/workspace/virt/libvirt/.git/objects/pack/pack-8a5dad0f6d3298383109a542f86da6ce1d31986f.idx 7f4f54e97000-7f4f54e9b000 r--p 00000000 08:07 2630457 /home/ryan/workspace/virt/libvirt/.git/objects/pack/pack-bd5db30bf170abd66cde3bf62ae6edd9fabebf90.idx 7f4f54e9b000-7f4f54e9e000 r--p 00000000 08:07 2629990 /home/ryan/workspace/virt/libvirt/.git/objects/pack/pack-cf70235d0a795e1f88cfcf33349daf3996ab10f6.idx 7f4f54e9e000-7f4f54ea1000 r--p 00000000 08:07 2629997 /home/ryan/workspace/virt/libvirt/.git/objects/pack/pack-1944def9e5c7e17a431147b5f547a8a133304e15.idx 7f4f54ea1000-7f4f54ea2000 rw-p 00000000 00:00 0 7fff96ab3000-7fff96ac8000 rw-p 00000000 00:00 0 [stack] 7fff96bff000-7fff96c00000 r-xp 00000000 00:00 0 [vdso] ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall] Aborted (core dumped) 2. the backtrace from gdb is: Core was generated by `git format-patch -2 --cover-letter'. Program terminated with signal 6, Aborted. #0 0x00000032b0632915 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64 64 return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig); Missing separate debuginfos, use: debuginfo-install libgcc-4.4.7-4.el6.x86_64 zlib-1.2.3-29.el6.x86_64 (gdb) bt #0 0x00000032b0632915 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64 #1 0x00000032b06340f5 in abort () at abort.c:92 #2 0x00000032b0670827 in __libc_message (do_abort=2, fmt=0x32b0758ae0 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:198 #3 0x00000032b0676156 in malloc_printerr (action=3, str=0x32b0758db8 "double free or corruption (fasttop)", ptr=<value optimized out>) at malloc.c:6336 #4 0x0000000000489785 in free_mailmap_entry (p=<value optimized out>, s=<value optimized out>) at mailmap.c:42 #5 0x00000000004b61e8 in string_list_clear_func (list=0x7fffa43846a8, clearfunc=0x489770 <free_mailmap_entry>) at string-list.c:129 #6 0x0000000000456db2 in shortlog_output (log=0x7fffa4384660) at builtin/shortlog.c:355 #7 0x00000000004337e7 in make_cover_letter (argc=<value optimized out>, argv=<value optimized out>, prefix=<value optimized out>) at builtin/log.c:745 #8 cmd_format_patch (argc=<value optimized out>, argv=<value optimized out>, prefix=<value optimized out>) at builtin/log.c:1215 #9 0x00000000004041a1 in run_builtin (argc=3, argv=0x7fffa4384ed0) at git.c:260 #10 handle_internal_command (argc=3, argv=0x7fffa4384ed0) at git.c:416 ---Type <return> to continue, or q <return> to quit--- #11 0x0000000000404382 in run_argv (argc=3, argv=0x7fffa4384ed0) at git.c:458 #12 main (argc=3, argv=0x7fffa4384ed0) at git.c:529 Actual results: Oops Expected results: No crash Additional info: The 0000-cover-letter.patch is generated incompletely, it lacks the statics infomation, like: ``` docs/formatdomain.html.in | 4 ++-- src/qemu/qemu_command.c | 8 ++++++++ 2 files changed, 10 insertions(+), 2 deletions(-) ```