net ads create keytab command crashing if you do:

$ net ads keytab create -U <username>  


bt:
(gdb) bt
#0  krb5_free_principal (context=<optimized out>, val=0x7f0fcc7359b7 <__add_to_environ+983>) at kfree.c:394
#1  0x00007f0fcda0e069 in krb5_free_keytab_entry_contents (context=<optimized out>, entry=entry@entry=0x7fff4a7fca40) at ktfr_entry.c:37
#2  0x00007f0fd0482365 in smb_krb5_kt_free_entry (context=<optimized out>, kt_entry=kt_entry@entry=0x7fff4a7fca40)
    at ../lib/krb5_wrap/krb5_samba.c:1102
#3  0x00007f0fd2a6c40d in ads_keytab_create_default (ads=<optimized out>) at ../source3/libads/kerberos_keytab.c:747
#4  0x00007f0fd443bbf0 in net_ads_keytab_create (c=0x7f0fd4c97190, argc=<optimized out>, argv=<optimized out>)
    at ../source3/utils/net_ads.c:2528
#5  0x00007f0fd4437c89 in net_ads_keytab (c=0x7f0fd4c97190, argc=1, argv=0x7f0fd4c99918) at ../source3/utils/net_ads.c:2597
#6  0x00007f0fd443e9a4 in net_ads (c=<optimized out>, argc=<optimized out>, argv=<optimized out>) at ../source3/utils/net_ads.c:3350
#7  0x00007f0fd441faea in main (argc=6, argv=0x7fff4a7fda68) at ../source3/utils/net.c:960

Patch will follow