"[[Assertion failure|AssertionError]] that occurs when a 
 value reference could not be initialized, including when:
 
 - a toplevel value could not be initialized due to 
   recursive dependencies upon other toplevel values, 
 - an uninitialized [[late]] value is evaluated, 
 - an initialized `late` but non-`variable` value is
   reassigned."​
​see (`function late`)
​since("1.1.0")
​shared class InitializationError(String description)
        extends AssertionError(description) {}
​