t8841.scala:13: error: recursive value c needs type
    val ambiguousName = c.ambiguousName
        ^
t8841.scala:12: warning: failed to determine if 'ambiguousName = ...' is a named argument or an assignment expression.
an explicit type is required for the definition mentioned in the error message above.
    val c = new Cell(ambiguousName = Some("bla"))
                                   ^
one warning found
one error found