Javascript-File-Import in inline component is null

A qml file imports a javascript file like this:

import 'qrc:/example.js' as E

In that same file, a inline component is defined and instantiated, which uses a function of that js file:

component MyText : Text {
    text: E.func()
}

MyText {}

The expectation is that the binding to the text property is (correctly) evaluated when the inline component is instantiated. Instead, an error is thrown:

TypeError: Cannot call method 'func' of null

I tested on 5.15.3 on Linux only, but I expect the same behaviour on all platforms.

Please find the attached minimal example to produce this error.