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### Description
I'm appending two contacts / branches upon receiving a call. This is a snippet
of the config I'm using to debug:
```
xlog ("=== branch 0: $(branch(uri)[0]), $(branch(q)[0])\n");
xlog ("=== branch 1: $(branch(uri)[1]), $(branch(q)[1])\n");
revert_uri();
t_load_contacts();
while (t_next_contacts()) {
xlog ("==== $ru\n");
}
```
We expect that the branches are rearranged by weight. When t_next_contacts()
is called, the $ru is being rewritten with the branch having the highest q
value. This behavior changed after upgrading to v5.4.0. The order of the
branches is now being reversed.
### Troubleshooting
#### Reproduction
<!--
If the issue can be reproduced, describe how it can be done.
-->
#### Debugging Data
<!--
If you got a core dump, use gdb to extract troubleshooting data - full
backtrace,
local variables and the list of the code at the issue location.
gdb /path/to/kamailio /path/to/corefile
bt full
info locals
list
If you are familiar with gdb, feel free to attach more of what you consider to
be relevant.
-->
```
(paste your debugging data here)
```
#### Log Messages
In v5.4.0, this is what we're seeing in the logs
```
ERROR: IBG_LOG: [email protected]: === branch 0:
sip:[email protected];transport=udp, 200
ERROR: IBG_LOG: [email protected]: === branch 1:
sip:[email protected];transport=tcp, 300
DEBUG: IBG_LOG: [email protected]: tm [t_serial.c:526]:
t_load_contacts(): load_contact mode not selected, using: 0
DEBUG: IBG_LOG: [email protected]: tm [t_serial.c:340]:
ki_t_load_contacts_mode(): nr_branches is 2
DEBUG: IBG_LOG: [email protected]: <core>
[core/xavp.c:539]: xavp_destroy_list(): destroying xavp list 0x7fcbe3103e20
DEBUG: IBG_LOG: [email protected]: tm [t_serial.c:890]:
ki_t_next_contacts(): Appending branch
uri-'sip:[email protected];transport=tcp' dst-'' path-'' inst-''
ruid-'' location_ua-''
DEBUG: IBG_LOG: [email protected]: <core>
[core/xavp.c:539]: xavp_destroy_list(): destroying xavp list 0x7fcbe3103b68
ERROR: IBG_LOG: [email protected]: ==== sip:1001@carrierB
DEBUG: IBG_LOG: [email protected]: <core>
[core/xavp.c:539]: xavp_destroy_list(): destroying xavp list 0x7fcbe3103890
ERROR: IBG_LOG: [email protected]: ====
sip:[email protected];transport=udp
DEBUG: IBG_LOG: [email protected]: tm [t_serial.c:627]:
ki_t_next_contacts(): no contacts in contacts_avp - we are done!
```
This was the behavior in v.5.3.4
```
ERROR: IBG_LOG: [email protected]: === branch 0:
sip:[email protected];transport=udp, 200
ERROR: IBG_LOG: [email protected]: === branch 1:
sip:[email protected];transport=tcp, 300
DEBUG: IBG_LOG: [email protected]: tm [t_serial.c:191]:
ki_t_load_contacts(): nr_branches is 2
DEBUG: IBG_LOG: [email protected]: <core>
[core/xavp.c:529]: xavp_destroy_list(): destroying xavp list 0x7f55bdf0c1d8
ERROR: IBG_LOG: [email protected]: ====
sip:[email protected];transport=tcp
DEBUG: IBG_LOG: [email protected]: <core>
[core/xavp.c:529]: xavp_destroy_list(): destroying xavp list 0x7f55bdf0bf00
ERROR: IBG_LOG: [email protected]: ====
sip:[email protected];transport=udp
DEBUG: IBG_LOG: [email protected]: <core>
[core/xavp.c:529]: xavp_destroy_list(): destroying xavp list 0x7f55bdf0bc28
ERROR: IBG_LOG: [email protected]: ==== sip:1001@carrierB
DEBUG: IBG_LOG: [email protected]: tm [t_serial.c:460]:
ki_t_next_contacts(): no contacts in contacts_avp - we are done!
```
#### SIP Traffic
<!--
If the issue is exposed by processing specific SIP messages, grab them with
ngrep or save in a pcap file, then add them next, or attach to issue, or
provide a link to download them (e.g., to a pastebin site).
-->
```
(paste your sip traffic here)
```
### Possible Solutions
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If you found a solution or workaround for the issue, describe it. Ideally,
provide a pull request with a fix.
-->
### Additional Information
* **Kamailio Version** - output of `kamailio -v`
```
(paste your output here)
```
* **Operating System**:
<!--
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```
(paste your output here)
```
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