qmlls crashes when a file contains a function inside a binding, or any file imported directly or indirectly by the current file contains one.

Typing either of the below bindings will instantly cause a crash:

import QtQuick

MouseArea {
    onClicked: {
        function test() {}
    }

    property var prop: {
        function test() {}
    }
}

A backtrace from a debug build of qtdeclarative is attached. It is also worth noting that qmllint does not crash.