Possible bug introduced in 5.8.5

Hi all,

I’m currently testing a migration from version 5.6.x to 5.8.x.

The problem:
1. INVITE comes in with a To-header like this:

  To: sip:[email protected]:5060

2. uac_replace_to in a branch_route:

  uac_replace_to("", "sip:+$(avp(newDAD){s.replace,CC,})@$var(carrierDomain);user=phone“);

Note: It does not matter if we try to change the To in different ways like:
  uac_replace_to("", "sip:[email protected];user=phone“);
Or:
  $td = „some.carrier.net";

3. What gets on the line is:

  To:  <sip:[email protected]:5060>sip:[email protected];user=phone

Or in case of ($td):

  To:  <sip:[email protected]:5060>some.carrier.net

Note: the INVITE received has 1 space between „To:" and Content, The INVITE send has 2 spaces.

The bug only appears if the initial to-header is NOT enclosed in < >.

I could track it down to version 5.8.5 in which it appeared first.
Everything before (including 5.8.4) behaves normally.

I think it’s introduced by commit 6367a41f64ed165792ffe71ea310fd917947ccba
There is a comment beneath it, that reports something similar with the From header, too.

How can I fix that in the config, or is it a bug?

Greetings,
Andreas
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