We often use 'ex-info' to throw a custom exception.But ex-info at least accepts two arguments: a string message and a data map.
In most cases，but we don't need to throw a exception that taken a data map.
So i think we can add a new arity to ex-info:
(ex-info "the exception message")
That created a ExceptionInfo instance carries empty data.
I am not sure it's useful for other people,but it's really useful for our developers.
The patch is attached.
java version "1.7.0_17"
Java(TM) SE Runtime Environment (build 1.7.0_17-b02)
Java HotSpot(TM) 64-Bit Server VM (build 23.7-b01, mixed mode)
Mac OSX 10.9.4