Empty output if refer to PS array name without a key

[vladsavchuk]

Consider the following code:

<~list_table>
#<~f[pagesize]>#<br>
#<~f[nonexistent]>#<br>

The output, as expected, is:

The output of the whole main.html is empty with the next code:

<~list_table>
#<~f[pagesize]>#<br>
#<~f[nonexistent]>#<br>
#<~f>#<br>

I expect empty string or 'array()' as a result of parsing <~f> tag

[osalabs]

tested in .net version - no error, it just returns "System.Collections.Hashtable" (i.e. Hashtable.toString() used)
For PHP it make sense to show array()