Importing a domain class named "Exception" raises an ambiguity exception during RHS compilation

If a user class named Exception is used,

import my.own.domain.Exception

rule "Foo"
when then end

the RHS compilation process resolves "Exception" to that name
rather than to java.lang.Exception

>> Rule compilation error [Rule name=Foo] :

{if import * is used }

The type Exception is ambiguous

{if explicit import is used }

Exception is not Throwable