string length validation doesn't work for the entry "" in case it has default value specified

[EvgeniiVR]

Hello team,
I've noticed that validate of the string length doesn't work for the entry "" in case leaf has default value.
let's say we have simple yang

  container c1 {
    leaf l1 {
      type string {
        length "1..127";
      }
      default "somestring";
    }
  }
> set c1 l1 ""
> show configuration
<c1 xmlns="urn:com:example:yang:test">
   <l1/>
</c1>
> show configuration default report-all
<c1 xmlns="urn:com:example:yang:test">
   <l1/>
</c1>

Null string overrides the default value but validate/commit doesn't respond with error caused by string length.
Is it expected behavior or not?
As in this case xml_body returns null. So we can't rely on yang and need to double-check element value just not to face with segfault or smth like that under certain circumstances.

[olofhagsand]

Fixed in validate.
Please verify