This doesn't look like a man-db bug, but rather some problem in (probably) debconf's GNOME frontend that man-db ran into when trying to use debconf. That frontend has since been rewritten to use GTK+ 3, so I think whatever this was has almost certainly been fixed in the intervening years.
Thanks for your report, and sorry for the long (!) delay.
Setting up man-db (2.5.7-4) ... daily/man- db ... weekly/ man-db ... so.6(+0x6c501) [0x34e501] so.6(+0x71c6d) [0x353c6d] so.6(realloc+ 0xe3)[0x353f53] libX11. so.6(+0x4a87f) [0x91987f] libX11. so.6(+0x4a9ed) [0x9199ed] libX11. so.6(_XlcCreate LocaleDataBase+ 0x1d5)[ 0x91a7a5] libX11. so.6(+0x50bd7) [0x91fbd7] libX11. so.6(+0x50133) [0x91f133] libX11. so.6(_XlcCreate LC+0x45) [0x91f8a5] libX11. so.6(_XlcUtf8Lo ader+0x2a) [0x943d4a] libX11. so.6(_XOpenLC+ 0x114)[ 0x927894] libX11. so.6(_XlcCurren tLC+0x23) [0x927a03] libX11. so.6(XSupportsL ocale+0x17) [0x927cb7] libgdk- x11-2.0. so.0(+0x59333) [0x7f2333] libgdk- x11-2.0. so.0(+0x5e7d7) [0x7f77d7] libgdk- x11-2.0. so.0(gdk_ pre_parse_ libgtk_ only+0x6d) [0x7ade2d] libgtk- x11-2.0. so.0(+0x12fa42) [0x144aa42] 2.0.so. 0(g_option_ context_ parse+0xaf) [0x62dd7f] libgtk- x11-2.0. so.0(gtk_ parse_args+ 0xac)[0x144a71c ] libgtk- x11-2.0. so.0(gtk_ init_check+ 0x24)[0x144a794 ] libgtk- x11-2.0. so.0(gtk_ init+0x24) [0x144a7d4] libbonoboui- 2.so.0( +0x20aa5) [0x7294aa5] libgnome- 2.so.0( gnome_program_ postinit+ 0xa0)[0xbc9920] libgnome- 2.so.0( +0xbd72) [0xbc9d72] perl5/auto/ Gnome2/ Gnome2. so(XS_Gnome2_ _Program_ init+0x1e8) [0x88ec7e8] perl(Perl_ pp_entersub+ 0x52b)[ 0x80d5d4b] perl(Perl_ runops_ standard+ 0x18)[0x80d4118 ] perl(perl_ run+0x342) [0x807cef2] perl(main+ 0xed)[0x80643ad ] so.6(__ libc_start_ main+0xe7) [0x2f8ce7] perl[0x8064221] files-2. 12.1.so files-2. 12.1.so files-2. 12.1.so libgthread- 2.0.so. 0.2600. 0 libgthread- 2.0.so. 0.2600. 0 libgthread- 2.0.so. 0.2600. 0 2.12.1. so 2.12.1. so 2.12.1. so libxcb- render. so.0.0. 0 libxcb- render. so.0.0. 0 libxcb- render. so.0.0. 0 libxcb. so.1.1. 0 libxcb. so.1.1. 0 libxcb. so.1.1. 0 perl/5. 10.1/auto/ List/Util/ Util.so perl/5. 10.1/auto/ List/Util/ Util.so perl/5. 10.1/auto/ List/Util/ Util.so libXrender. so.1.3. 0 libXrender. so.1.3. 0 libXrender. so.1.3. 0 libXau. so.6.0. 0 libXau. so.6.0. 0 libXau. so.6.0. 0 libxcb- shm.so. 0.0.0 libxcb- shm.so. 0.0.0 libxcb- shm.so. 0.0.0 libgmodule- 2.0.so. 0.2600. 0 libgmodule- 2.0.so. 0.2600. 0 libgmodule- 2.0.so. 0.2600. 0 nis-2.12. 1.so nis-2.12. 1.so nis-2.12. 1.so libgobject- 2.0.so. 0.2600. 0 libgobject- 2.0.so. 0.2600. 0 libgobject- 2.0.so. 0.2600. 0 so.3.12. 1 so.3.12. 1 so.3.12. 1 perl5/auto/ Cairo/Cairo. so perl5/auto/ Cairo/Cairo. so perl5/auto/ Cairo/Cairo. so so.1.2. 3.4 so.1.2. 3.4 so.1.2. 3.4 libgdk_ pixbuf- 2.0.so. 0.2200. 0 libgdk_ pixbuf- 2.0.so. 0.2200. 0 libgdk_ pixbuf- 2.0.so. 0.2200. 0 2.12.1. so 2.12.1. so 2.12.1. so libXinerama. so.1.0. 0 libXinerama. so.1.0. 0 libXinerama. so.1.0. 0 perl/5. 10.1/auto/ IO/IO.so perl/5. 10.1/auto/ IO/IO.so perl/5. 10.1/auto/ IO/IO.so libfontconfig. so.1.4. 4 libfontconfig. so.1.4. 4 libfontconfig. so.1.4. 4 so.1.5. 2 so.1.5. 2 so.1.5. 2 libXext. so.6.4. 0 libXext. so.6.4. 0 libXext. so.6.4. 0 libXcomposite. so.1.0. 0 libXcomposite. so.1.0. 0 libXcomposite. so.1.0. 0dpkg: error processing man-db (--configure):
Installing new version of config file /etc/cron.
Installing new version of config file /etc/cron.
*** glibc detected *** /usr/bin/perl: realloc(): invalid next size: 0x09ff3438 ***
======= Backtrace: =========
/lib/libc.
/lib/libc.
/lib/libc.
/usr/lib/
/usr/lib/
/usr/lib/
/usr/lib/
/usr/lib/
/usr/lib/
/usr/lib/
/usr/lib/
/usr/lib/
/usr/lib/
/usr/lib/
/usr/lib/
/usr/lib/
/usr/lib/
/lib/libglib-
/usr/lib/
/usr/lib/
/usr/lib/
/usr/lib/
/usr/lib/
/usr/lib/
/usr/lib/
/usr/bin/
/usr/bin/
/usr/bin/
/usr/bin/
/lib/libc.
/usr/bin/
======= Memory map: ========
00110000-0011a000 r-xp 00000000 08:01 2230507 /lib/libnss_
0011a000-0011b000 r--p 00009000 08:01 2230507 /lib/libnss_
0011b000-0011c000 rw-p 0000a000 08:01 2230507 /lib/libnss_
0011c000-0011f000 r-xp 00000000 08:01 134226 /usr/lib/
0011f000-00120000 r--p 00003000 08:01 134226 /usr/lib/
00120000-00121000 rw-p 00004000 08:01 134226 /usr/lib/
00121000-00128000 r-xp 00000000 08:01 2230511 /lib/librt-
00128000-00129000 r--p 00006000 08:01 2230511 /lib/librt-
00129000-0012a000 rw-p 00007000 08:01 2230511 /lib/librt-
0012a000-00130000 r-xp 00000000 08:01 133925 /usr/lib/
00130000-00131000 r--p 00005000 08:01 133925 /usr/lib/
00131000-00132000 rw-p 00006000 08:01 133925 /usr/lib/
00132000-0014a000 r-xp 00000000 08:01 133940 /usr/lib/
0014a000-0014b000 r--p 00017000 08:01 133940 /usr/lib/
0014b000-0014c000 rw-p 00018000 08:01 133940 /usr/lib/
0014e000-00157000 r-xp 00000000 08:01 394065 /usr/lib/
00157000-00158000 r--p 00008000 08:01 394065 /usr/lib/
00158000-00159000 rw-p 00009000 08:01 394065 /usr/lib/
00159000-00161000 r-xp 00000000 08:01 137952 /usr/lib/
00161000-00162000 r--p 00007000 08:01 137952 /usr/lib/
00162000-00163000 rw-p 00008000 08:01 137952 /usr/lib/
00163000-00165000 r-xp 00000000 08:01 134667 /usr/lib/
00165000-00166000 r--p 00001000 08:01 134667 /usr/lib/
00166000-00167000 rw-p 00002000 08:01 134667 /usr/lib/
0016a000-0016c000 r-xp 00000000 08:01 134934 /usr/lib/
0016c000-0016d000 r--p 00001000 08:01 134934 /usr/lib/
0016d000-0016e000 rw-p 00002000 08:01 134934 /usr/lib/
0016e000-00170000 r-xp 00000000 08:01 134225 /usr/lib/
00170000-00171000 r--p 00002000 08:01 134225 /usr/lib/
00171000-00172000 rw-p 00003000 08:01 134225 /usr/lib/
00174000-0017d000 r-xp 00000000 08:01 2230513 /lib/libnss_
0017d000-0017e000 r--p 00008000 08:01 2230513 /lib/libnss_
0017e000-0017f000 rw-p 00009000 08:01 2230513 /lib/libnss_
0017f000-001bf000 r-xp 00000000 08:01 131963 /usr/lib/
001bf000-001c0000 r--p 00040000 08:01 131963 /usr/lib/
001c0000-001c1000 rw-p 00041000 08:01 131963 /usr/lib/
001c1000-001f4000 r-xp 00000000 08:01 2228316 /lib/libpcre.
001f4000-001f5000 r--p 00032000 08:01 2228316 /lib/libpcre.
001f5000-001f6000 rw-p 00033000 08:01 2228316 /lib/libpcre.
001f6000-00233000 r-xp 00000000 08:01 393281 /usr/lib/
00233000-00234000 r--p 0003d000 08:01 393281 /usr/lib/
00234000-00235000 rw-p 0003e000 08:01 393281 /usr/lib/
00235000-00248000 r-xp 00000000 08:01 2228277 /lib/libz.
00248000-00249000 r--p 00012000 08:01 2228277 /lib/libz.
00249000-0024a000 rw-p 00013000 08:01 2228277 /lib/libz.
0024a000-00261000 r-xp 00000000 08:01 134424 /usr/lib/
00261000-00262000 r--p 00017000 08:01 134424 /usr/lib/
00262000-00263000 rw-p 00018000 08:01 134424 /usr/lib/
00263000-00265000 r-xp 00000000 08:01 2230509 /lib/libdl-
00265000-00266000 r--p 00001000 08:01 2230509 /lib/libdl-
00266000-00267000 rw-p 00002000 08:01 2230509 /lib/libdl-
00267000-00269000 r-xp 00000000 08:01 133950 /usr/lib/
00269000-0026a000 r--p 00001000 08:01 133950 /usr/lib/
0026a000-0026b000 rw-p 00002000 08:01 133950 /usr/lib/
0026d000-00271000 r-xp 00000000 08:01 394064 /usr/lib/
00271000-00272000 r--p 00003000 08:01 394064 /usr/lib/
00272000-00273000 rw-p 00004000 08:01 394064 /usr/lib/
00273000-002a1000 r-xp 00000000 08:01 134222 /usr/lib/
002a1000-002a2000 r--p 0002d000 08:01 134222 /usr/lib/
002a2000-002a3000 rw-p 0002e000 08:01 134222 /usr/lib/
002a3000-002c7000 r-xp 00000000 08:01 2228300 /lib/libexpat.
002c7000-002c9000 r--p 00024000 08:01 2228300 /lib/libexpat.
002c9000-002ca000 rw-p 00026000 08:01 2228300 /lib/libexpat.
002ca000-002d8000 r-xp 00000000 08:01 134137 /usr/lib/
002d8000-002d9000 r--p 0000d000 08:01 134137 /usr/lib/
002d9000-002da000 rw-p 0000e000 08:01 134137 /usr/lib/
002da000-002dc000 r-xp 00000000 08:01 133944 /usr/lib/
002dc000-002dd000 r--p 00001000 08:01 133944 /usr/lib/
002dd000-002de000 rw-p 00002000 08:01 133944 /usr/lib/
subprocess installed post-installation script killed by signal (Aborted)
This doesn't look like a man-db bug, but rather some problem in (probably) debconf's GNOME frontend that man-db ran into when trying to use debconf. That frontend has since been rewritten to use GTK+ 3, so I think whatever this was has almost certainly been fixed in the intervening years.