Error when trying to use isArray() within an expression

[Stevenic]

Describe the bug

I get an error when trying to use the isArray() function within an expression. It is in fact a valid function:

Version

1.0.0

[boydc2014]

this should be also be fixed in #3141, right @zhixzhan

[zhixzhan]

this should be also be fixed in #3141, right @zhixzhan

Yes, it's fixed in #3141