[Users] Questions about regexp and AVPs

I think I'm missing something pretty obvious here, but is there a reason that avp_check("$avp(tmpVar1)", "re/$avp(myNetwork0)/i") barfs on 1.1.x?

I get the error 0(0) ERROR:avpops:fixup_check_avp: regexp operation requires string value 0(0) ERROR: fix_actions: fixing failed (code=-1) at cfg line 3491

In the above, $avp(tmpVar1) == "1.2.3.4" $avp(myNetwork0) == "1.2.3"

Now, I'd hoped that I could actually run the following avp_check("$avp(tmpVar1)", "re/^$avp(myNetwork0)/i") but that doesn't work

Then, setting $avp(myNetwork0) == "^1.2.3" and running avp_check("$avp(tmpVar1)", "re/$avp(myNetwork0)/i") didn't work either

Sooo, whats the solution? avp_check can't have AVPs on both sides of the check?

cheers