(ITS#8472) slapd killed after ldapadd

Full_Name: Dominik Spychalski Version: 2.4.44 OS: Ubuntu 14.04 URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (141.12.66.96)

When trying to delete the olcDbIndex-Entry (to add it afterwards with additional indexes) in olcDatabase={1}mdb,cn=config:

dn: olcDatabase={1}mdb,cn=config changeType: modify delete: olcDbIndex

ldapadd -x -D cn=config -w *** -f del.ldif

the slapd process gets killed with the error message:

57a08182 ch_calloc of 1 elems of 0 bytes failed slapd: ch_malloc.c:107: ch_calloc: Assertion `0' failed.

If I try to add an additional olcDbIndex with other values, everything works fine.