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### Description
cfgutils route_if_exists can leak when
1: using a $var or $avp
2: some functions are called within the called route
### Troubleshooting
#### Reproduction
Note the route is executed from `rtimer` in case this is part of the problem
somehow.
```
modparam("rtimer", "timer", "name=tmetrics;interval=9;mode=1;")
modparam("rtimer", "exec", "timer=tmetrics;route=test")
```
example :
```
route[dummy] {
xinfo("[dummy]");
statsd_gauge("dummy_1xx", $stat(1xx_replies));
}
route[test] {
$var(route_name) = "dummy";
route_if_exists($var(route_name));
]
```
working alternative
```
route[dummy] {
xinfo("[dummy]");
statsd_gauge("dummy_1xx", $stat(1xx_replies));
}
route[test] {
$var(route_name) = "dummy";
if (check_route_exists($var(route_name))) {
route($var(route_name));
}
}
```
#### Debugging Data
```
kamcmd pkg.stats you can see the `real_used` of the timer process with leak
every time the route is called
```
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