id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc	lang	patch	platform
549	Kill UnionVal	whiteknight	whiteknight	"Thanks to cotto++, PMCs now don't rely on UnionVal anymore. However, a number of other structures still do rely on it:

1) call_state structures, as used in the various calling conventions and JIT system files
2) stacks, especially in src/stacks.c.
3) Lists, in src/list.c. 
4) STRINGs, in src/string/*. Uses mostly buflen and bufstart to manage system memory. Also shows up in a few places in src/gc/* where string memory is managed.

There are a few other places maybe too. We're going to have to fix up all these systems to avoid UnionVal before we can remove it completely."	todo	closed	normal		none		medium	fixed	UnionVal