gistfile1.txt

Version-Controlled Changes
&await no longer blocks a thread while waiting
whenever not in lexical scope of react throws
$*ARGFILES inside sub MAIN is always fed by $*IN (see IO::CatHandle type if you need old behaviour)
Constructs (literally that, with no space inside parentheses) $(), @(), and %() are no longer magical
Variables with :D/:U type constraints default to type object of the constrained type
	(e.g. so you could use .new with them)
start blocks in sink context attach exception handler
Routines must use return-rw to return a Proxy, even if routine is marked as is raw or is rw
Native num types default to 0e0 instead of NaN
On subroutine names, the colonpair with key sym (e.g. :sym<foo>) is reserved