Hello,
I am not sure what happened (what caused it) but FYI:
(gdb) bt
#0 0x00007fc12366e33b in ?? () from /lib/libc.so.6
#1 0x00007fc12366f988 in ?? () from /lib/libc.so.6
#2 0x00007fc12366fcf6 in free () from /lib/libc.so.6
#3 0x0000000000454e1f in xfree (p=0x17aac70) at xmalloc.cc:86
#4 0x00000000004093b6 in ~xstring0 (this=0x17a9260) at xstring.h:83
#5 0x00000000004093cd in ~xstring_c (this=0x17a9260) at xstring.h:93
#6 0x000000000042b5fc in ~Pair (this=0x17a9250) at keyvalue.h:48
#7 0x000000000042b4af in KeyValueDB::Purge (this=0x71b800, p=0x71b808)
at keyvalue.h:63
#8 0x000000000042b4d1 in KeyValueDB::Empty (this=0x71b800) at keyvalue.h:89
#9 0x000000000042b5c4 in ~KeyValueDB (this=0x71b800) at keyvalue.h:127
#10 0x000000000042aabe in ~History (this=0x71b800) at history.cc:52
#11 0x00007fc123630cad in exit () from /lib/libc.so.6
#12 0x00007fc12361a5ad in __libc_start_main () from /lib/libc.so.6
#13 0x0000000000408249 in _start () at ../sysdeps/x86_64/elf/start.S:113
(gdb) bt full
#0 0x00007fc12366e33b in ?? () from /lib/libc.so.6
No symbol table info available.
#1 0x00007fc12366f988 in ?? () from /lib/libc.so.6
No symbol table info available.
#2 0x00007fc12366fcf6 in free () from /lib/libc.so.6
No symbol table info available.
#3 0x0000000000454e1f in xfree (p=0x17aac70) at xmalloc.cc:86
No locals.
#4 0x00000000004093b6 in ~xstring0 (this=0x17a9260) at xstring.h:83
No locals.
#5 0x00000000004093cd in ~xstring_c (this=0x17a9260) at xstring.h:93
No locals.
#6 0x000000000042b5fc in ~Pair (this=0x17a9250) at keyvalue.h:48
No locals.
#7 0x000000000042b4af in KeyValueDB::Purge (this=0x71b800, p=0x71b808)
at keyvalue.h:63
to_free = (class KeyValueDB::Pair *) 0x17a9250
#8 0x000000000042b4d1 in KeyValueDB::Empty (this=0x71b800) at keyvalue.h:89
No locals.
#9 0x000000000042b5c4 in ~KeyValueDB (this=0x71b800) at keyvalue.h:127
No locals.
#10 0x000000000042aabe in ~History (this=0x71b800) at history.cc:52
No locals.
---Type <return> to continue, or q <return> to quit---
#11 0x00007fc123630cad in exit () from /lib/libc.so.6
No symbol table info available.
#12 0x00007fc12361a5ad in __libc_start_main () from /lib/libc.so.6
No symbol table info available.
#13 0x0000000000408249 in _start () at ../sysdeps/x86_64/elf/start.S:113
No locals.
(gdb)
Justin.