multiple free in ldapsearch

[manu@netbsd.org (Emmanuel Dreyfus)]

Hello

NetBSD's libc reports a multiple free each time I run 2.4.15's
ldapsearch using  x509 certificate authentication (That is, SASL
EXTERNAL):

Running with export MALLOC_OPTIONS=A, it is kind enough to abort, so I
have a backtrace:

(gdb) bt
#0  0xbb94223f in kill () from /usr/lib/libc.so.12
#1  0xbb9dea64 in abort () from /usr/lib/libc.so.12
#2  0xbb9dd300 in tcgetattr () from /usr/lib/libc.so.12
#3  0xbb9dd331 in tcgetattr () from /usr/lib/libc.so.12
#4  0xbb9de661 in free () from /usr/lib/libc.so.12
#5  0xbbaff5c7 in CRYPTO_free () from /usr/lib/libcrypto.so.3
#6  0xbbad0871 in X509_asn1_meth () from /usr/lib/libcrypto.so.3
#7  0xbbaec6d7 in ASN1_primitive_free () from /usr/lib/libcrypto.so.3
#8  0xbbaec8f3 in ASN1_item_free () from /usr/lib/libcrypto.so.3
#9  0xbbad09dd in X509_free () from /usr/lib/libcrypto.so.3
#10 0xbbb6fe31 in ssl_cert_free () from /usr/lib/libssl.so.4
#11 0xbbb6d981 in SSL_CTX_free () from /usr/lib/libssl.so.4
#12 0xbbbe008f in tlso_ctx_free () from /usr/pkg/lib/libldap-2.4.so.2
#13 0xbbbdce5b in ldap_pvt_tls_ctx_free () from
/usr/pkg/lib/libldap-2.4.so.2
#14 0xbbbdcf78 in ldap_int_tls_destroy () from
/usr/pkg/lib/libldap-2.4.so.2
#15 0xbbbdd06e in ldap_pvt_tls_destroy () from
/usr/pkg/lib/libldap-2.4.so.2
#16 0x08050e88 in ?? ()
#17 0x00000000 in ?? ()

I will investigate further if I find time, but I post this just in case
it rings a bell for someone. 

-- 
Emmanuel Dreyfus
http://hcpnet.free.fr/pubz
manu@netbsd.org