Why in this example `item1` is highlighted with "C...

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[tapchicoma]

Why in this example item1 is highlighted with "Cannot infer a type for this parameter. Please specify it explicitly"?

Is there a way to modify someWrapper() to remove this error?

-.kt

[Stefan Beyer]

it should be item instead of item1, but aside from that, intuitively this should work... weird.

[Marc Knaup]

I guess { item1 -> println(item) }.someWrapper() is evaluated first and then it's not clear what the lambda is supposed to take or return.
Because that's unknown .someWrapper() should also not resolve, but that's probably not indicated because it's a subsequent error, not the initial one.

Would item (item1) have a type then the result of the lambda can be inferred as Unit (from println with known parameter type) and then .someWrapper() should also work fine.

That everything is put into addReceiver in the end is probably not considered because that would require that the expression is evaluated in the completely opposite order (outside to inside).

[tapchicoma]

mm, if I add wrong type to item1 - then IDE highlights .someWrapper() with wrong "type inference failed" error

[tapchicoma]

So I guess @Marc Knaup is right