Absence of Profiler.EndSample() does not give an error

1. Open project attached.
2. Enter playmode.

Update() looks like:

private void Update()
{
Profiler.BeginSample("thisIsMySample");

//some code here

Debug.Log("thisIsMySample");
// Profiler.EndSample();
}

Actual result: Sampling is autoclosed in Update.
Expected result: there should be an error about the absence of Profiler.EndSample().

Reproduces in 2017.4.6f1, 2018.2.0b9, 2018.3.0a1