[LLVMdev] multiple return value assembler regression?

[Bagel]

It appears the syntax for returning multiple values has changed since 2.9.
Previous to that:
	ret  i32 %a, i32 %b
worked.  The new syntax is something like:
	ret  { i32, i32 }{i32 %a, i32 %b}
but this yields an error:
mrv-bug.ll:5:24: error: invalid use of function-local name
	ret  { i32, i32 }{i32 %a, i32 %b}
	                      ^
If %a and %b are replaced by constants, things work.

Am I doing something wrong, or should I file a bug report?