Please answer these questions before submitting your issue. Thanks!

What version of Go are you using (go version)?

go1.10

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

all

What did you do?

When storing the results into two variables, the special form of a map index operation can return two parts. The same is not true in a return statement, even when the function signature makes this unambiguous.

https://play.golang.org/p/mmJ8ZlWC2yn

What did you expect to see?

I would expect CheckCache_works and CheckCache_shouldWork to function identically.

What did you see instead?

gc refuses to compile the return statement, saying:

prog.go:15:2: not enough arguments to return
	have (int)
	want (int, bool)

Apologies if this duplicates a previous issue. I found searching for and naming this issue pretty hard.