:onerror is not triggered by /file/set

RouterOS Scripting
1

In my scripts I relied on /file/set to trigger an error when executed inside :onerror block, like so:

    :onerror varError in={
        /file/set $argPath contents=$argContents
    } do={
        :if ($varError ~ "no such item") do={
            /file/add name=$argPath type=file contents=$argContents
        } else={
            :error $varError
        }
    }

But I just noticed that on 7.21.5 it doesn't trigger the error anymore, not even logging one. Just quietly fails. Was I hallucinating when I wrote it? Or is it a bug that was fixed in newer versions of RouterOS?

2

In the meantime modified it by adding /file/get which still triggers the error:

    :onerror varError in={
        /file/get $argPath value-name=size
        /file/set $argPath contents=$argContents
    } do={
        :if ($varError ~ "no such item") do={
            /file/add name=$argPath type=file contents=$argContents
        } else={
            :error $varError
        }
    }
3

Both versions work on 7.24.0 in a quick test. But I tried on long-term using same code, and it does not work. Now I did the following at CLI on both.

{ 
:local argPath disk1/kfile1
:local argContents kfile1
:onerror varError in={
        /file/set $argPath contents=$argContents
    } do={
        :if ($varError ~ "no such item") do={
            /file/add name=$argPath type=file contents=$argContents
        } else={
            :put "in error block"
            :error $varError
        }
    }
:put [/file/get $argPath contents]
}

So 7.21.5 get "no such item" (seemingly skipping your check, since I do not see the "in error block" message. While 7.24.0, works as expected.