Memory leak in couchstore

Given the fact that CouchKVStore opens and close the database files all of the time this should be treated as a blocker.

Valgrind reports the following leak:

==33161==
==33161== 40 bytes in 1 blocks are possibly lost in loss record 2 of 17
==33161== at 0xB823: malloc (vg_replace_malloc.c:266)
==33161== by 0x20AFD: buffered_constructor_with_raw_ops (iobuffer.c:242)
==33161== by 0x211AB: couch_get_buffered_file_ops (iobuffer.c:419)
==33161== by 0x1C50E: couchstore_open_db_ex (couch_db.c:200)
==33161== by 0x1C33A: couchstore_open_db (couch_db.c:155)
==33161== by 0x100000E4F: main (mb-bla.c:12)
==33161==
==33161==
==33161== 6,480 bytes in 162 blocks are indirectly lost in loss record 10 of 17
==33161== at 0xB823: malloc (vg_replace_malloc.c:266)
==33161== by 0x20AFD: buffered_constructor_with_raw_ops (iobuffer.c:242)
==33161== by 0x211AB: couch_get_buffered_file_ops (iobuffer.c:419)
==33161== by 0x1C50E: couchstore_open_db_ex (couch_db.c:200)
==33161== by 0x1C33A: couchstore_open_db (couch_db.c:155)
==33161== by 0x100000E4F: main (mb-bla.c:12)
==33161==
==33161== 8,248 bytes in 1 blocks are possibly lost in loss record 11 of 17
==33161== at 0xB823: malloc (vg_replace_malloc.c:266)
==33161== by 0x20188: new_buffer (iobuffer.c:59)
==33161== by 0x20B71: buffered_constructor_with_raw_ops (iobuffer.c:248)
==33161== by 0x211AB: couch_get_buffered_file_ops (iobuffer.c:419)
==33161== by 0x1C50E: couchstore_open_db_ex (couch_db.c:200)
==33161== by 0x1C33A: couchstore_open_db (couch_db.c:155)
==33161== by 0x100000E4F: main (mb-bla.c:12)
==33161==
==33161== 131,128 bytes in 1 blocks are possibly lost in loss record 12 of 17
==33161== at 0xB823: malloc (vg_replace_malloc.c:266)
==33161== by 0x20188: new_buffer (iobuffer.c:59)
==33161== by 0x20B50: buffered_constructor_with_raw_ops (iobuffer.c:247)
==33161== by 0x211AB: couch_get_buffered_file_ops (iobuffer.c:419)
==33161== by 0x1C50E: couchstore_open_db_ex (couch_db.c:200)
==33161== by 0x1C33A: couchstore_open_db (couch_db.c:155)
==33161== by 0x100000E4F: main (mb-bla.c:12)
==33161==
==33161== 8,225,544 (486,632 direct, 7,738,912 indirect) bytes in 59 blocks are definitely lost in loss record 13 of 17
==33161== at 0xB823: malloc (vg_replace_malloc.c:266)
==33161== by 0x20188: new_buffer (iobuffer.c:59)
==33161== by 0x20B71: buffered_constructor_with_raw_ops (iobuffer.c:248)
==33161== by 0x211AB: couch_get_buffered_file_ops (iobuffer.c:419)
==33161== by 0x1C50E: couchstore_open_db_ex (couch_db.c:200)
==33161== by 0x1C33A: couchstore_open_db (couch_db.c:155)
==33161== by 0x100000E4F: main (mb-bla.c:12)
==33161==
==33161== 14,359,848 (13,506,184 direct, 853,664 indirect) bytes in 103 blocks are definitely lost in loss record 14 of 17
==33161== at 0xB823: malloc (vg_replace_malloc.c:266)
==33161== by 0x20188: new_buffer (iobuffer.c:59)
==33161== by 0x20B50: buffered_constructor_with_raw_ops (iobuffer.c:247)
==33161== by 0x211AB: couch_get_buffered_file_ops (iobuffer.c:419)
==33161== by 0x1C50E: couchstore_open_db_ex (couch_db.c:200)
==33161== by 0x1C33A: couchstore_open_db (couch_db.c:155)
==33161== by 0x100000E4F: main (mb-bla.c:12)
==33161==
==33161== 81,985,120 bytes in 9,940 blocks are indirectly lost in loss record 15 of 17
==33161== at 0xB823: malloc (vg_replace_malloc.c:266)
==33161== by 0x20188: new_buffer (iobuffer.c:59)
==33161== by 0x20B71: buffered_constructor_with_raw_ops (iobuffer.c:248)
==33161== by 0x211AB: couch_get_buffered_file_ops (iobuffer.c:419)
==33161== by 0x1C50E: couchstore_open_db_ex (couch_db.c:200)
==33161== by 0x1C33A: couchstore_open_db (couch_db.c:155)
==33161== by 0x100000E4F: main (mb-bla.c:12)
==33161==
==33161== 1,297,642,688 bytes in 9,896 blocks are indirectly lost in loss record 16 of 17
==33161== at 0xB823: malloc (vg_replace_malloc.c:266)
==33161== by 0x20188: new_buffer (iobuffer.c:59)
==33161== by 0x20B50: buffered_constructor_with_raw_ops (iobuffer.c:247)
==33161== by 0x211AB: couch_get_buffered_file_ops (iobuffer.c:419)
==33161== by 0x1C50E: couchstore_open_db_ex (couch_db.c:200)
==33161== by 0x1C33A: couchstore_open_db (couch_db.c:155)
==33161== by 0x100000E4F: main (mb-bla.c:12)
==33161==
==33161== 1,371,435,192 (393,480 direct, 1,371,041,712 indirect) bytes in 9,837 blocks are definitely lost in loss record 17 of 17
==33161== at 0xB823: malloc (vg_replace_malloc.c:266)
==33161== by 0x20AFD: buffered_constructor_with_raw_ops (iobuffer.c:242)
==33161== by 0x211AB: couch_get_buffered_file_ops (iobuffer.c:419)
==33161== by 0x1C50E: couchstore_open_db_ex (couch_db.c:200)
==33161== by 0x1C33A: couchstore_open_db (couch_db.c:155)
==33161== by 0x100000E4F: main (mb-bla.c:12)
==33161==
==33161== LEAK SUMMARY:
==33161== definitely lost: 14,386,296 bytes in 9,999 blocks
==33161== indirectly lost: 1,379,634,288 bytes in 19,998 blocks
==33161== possibly lost: 139,416 bytes in 3 blocks
==33161== still reachable: 1,969 bytes in 28 blocks
==33161== suppressed: 0 bytes in 0 blocks
==33161==
==33161== For counts of detected and suppressed errors, rerun with: -v
==33161== ERROR SUMMARY: 6 errors from 6 contexts (suppressed: 1 from 1)