Description of problem:

A customer needed to get the number of entries in a given DB.
Based on this article we asked him to run dbscan:
https://github.com/richm/scripts/wiki/dbmon.sh

But dbscan is crashing in the customer environment.


Version-Release number of selected component (if applicable):

RHDS 9 - 389 1.2.11.15-84.


How reproducible:

Easily at customer site.


Steps to Reproduce:

For instance,
# dbscan -f /var/lib/dirsrv/slapd-389/db/customer/id2entry.db4  -t 200 > slapd-389_customer.txt
/usr/bin/dbscan: line 51: 28783 Segmentation fault      (core dumped) ${dir}/${COMMAND} "$@"
#


Actual results:

Command is crashing.


Expected results:

On a Red Hat test machine with RHDS 9 ( 1.2.11.15-62 ):
# dbscan -f /var/lib/dirsrv/slapd-gparenterhel64/db/userRoot/id2entry.db4 -t 200 | grep rdn:
	rdn: dc=hq,dc=gsslab,dc=rdu,dc=redhat,dc=com
	rdn: cn=Directory Administrators
	rdn: ou=Groups
	rdn: ou=People
	rdn: ou=Special Users
	rdn: cn=Accounting Managers
	rdn: cn=HR Managers
	rdn: cn=QA Managers
	rdn: cn=PD Managers
#


Additional info:

An excerpt of the backtrace:
===============================================
GNU gdb (GDB) Red Hat Enterprise Linux (7.2-75.el6)
...

Program terminated with signal 11, Segmentation fault.
#0  0x00000035e12784fd in _int_free () from /lib64/libc.so.6

Thread 1 (Thread 0x7fa12fa57700 (LWP 25124)):
#0  0x00000035e12784fd in _int_free () from /lib64/libc.so.6
No symbol table info available.
#1  0x00000035e127b72e in _int_realloc () from /lib64/libc.so.6
No symbol table info available.
#2  0x00000035e127baf5 in realloc () from /lib64/libc.so.6
No symbol table info available.
#3  0x000000341172ad48 in __os_urealloc () from /usr/lib64/libdb-4.7.so
No symbol table info available.
#4  0x00000034116f2ce6 in __db_retcopy () from /usr/lib64/libdb-4.7.so
No symbol table info available.
#5  0x00000034116f2e28 in __db_ret () from /usr/lib64/libdb-4.7.so
No symbol table info available.
#6  0x00000034116d5eaf in __dbc_get () from /usr/lib64/libdb-4.7.so
No symbol table info available.
#7  0x00000034116de91d in __dbc_get_pp () from /usr/lib64/libdb-4.7.so
No symbol table info available.
#8  0x0000000000403014 in main (argc=<value optimized out>, argv=<value optimized out>) at ldap/servers/slapd/tools/dbscan.c:1297
===============================================