I noticed this the other day:

@Js
class Example {	
    // WARNING: Type 'acme::JvmOnly' not available in Js
    JvmOnly?   test1() { null }

    // WARNING: Type 'acme::JvmOnly' not available in Js
    Void       test2(JvmOnly jvm) { }

    // No warning
    Void       test3(|JvmOnly| func) { }

    // No warning
    |JvmOnly|? test4() { null }
}

class JvmOnly {}

Generally, warnings are given for types not available in Javascript - but it doesn't seem work for func params.

Ticket promoted to #2488 and assigned to andy

This issue has also affected me:

@Js
class Example {
  JvmOnly[]? test
}

class JvmOnly {}

This also isn't generating a warning in the Example class regardless of whether the field test is used or not.

Regards,

Ticket resolved in 1.0.76

I pushed a fix for this that will be in the next build. It should be fairly robust now in terms of finding usage of non-JS types.