#597 registrar complains of a BUG

[Kiss Karoly]

I noticed the following in an opensips version 1.8.2 (rev #9429) log:
Nov 29 10:49:14 sip /usr/sbin/opensips[30799]: CRITICAL:registrar:update_contacts: BUG - overflow detected with r=0xa96c1a34 and contacts=(nil)

This happened right after a call to
save("location", "$avp(rflags)fc$avp(maxregs)", "$var(furi)")
Contents of avp's and variables were:
$avp(rflags) = "";
$avp(maxregs) = 1;
$var(furi) = "sip:username@domain.tld";

[Bogdan-Andrei Iancu]

Is this reproducible ?

[Kiss Karoly]

I only noticed it once in the logs, so I have no idea how to reproduce it.
Can you give me some pointers on what could cause this ?
Maybe that way I can try to reproduce it.