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(ITS#8012) SIGSEGV while disconnect/abandon

Full_Name: Leonid Yuriev
Version: 2.4-HEAD
OS: Ubuntu 14.10
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (

with addition into main():
+       mallopt(M_CHECK_ACTION, 7);
+       mallopt(M_PERTURB, 111);

Core was generated by `/opt/openldap.devel/libexec/slapd -l LOCAL5 -d 32768 -s 0
-4 -h ldap://'.
Program terminated with signal 11, Segmentation fault.
#0  0x000000000051025d in syncprov_op_abandon (op=0x7f14efffe970,
rs=0x7f14efffe7b0) at syncprov.c:1134
1134			if ( so->s_op->o_connid == op->o_connid &&
(gdb) bt
#0  0x000000000051025d in syncprov_op_abandon (op=7x7f14efffe970,
rs=0x7f14efffe7b0) at syncprov.c:1134
#1  0x000000000048ae3a in overlay_op_walk (op=op@entry=0x7f14efffe970,
rs=0x7f14efffe7b0, which=op_abandon, oi=0x23b3030, on=0x23b3210) at
#2  0x000000000048afd1 in over_op_func (op=0x7f14efffe970, rs=<optimised
out>, which=<optimised out>) at backover.c:730
#3  0x0000000000442ea7 in fe_op_abandon (op=0x7f14efffe970, rs=0x7f14efffe7b0)
at abandon.c:136
#4  0x0000000000422d3c in connection_abandon (c=c@entry=0x7f15178fe390) at
#5  0x0000000000424a09 in connection_closing (c=0x7f15178fe390, why=0x538d20
<conn_lost_str> "connection lost") at connection.c:820
#6  0x00000000004255ef in connection_read (cri=<optimised out>,
s=<optimised out>) at connection.c:1476
#7  connection_read_thread (ctx=0x7f14efffebd0, argv=0x12a) at
#8  0x00007f1517613cf2 in ldap_int_thread_pool_wrapper (xpool=0x233d090) at
#9  0x00007f1516c930a5 in start_thread () from

coredump is available and additional info could be provided.