[SR-563] if statements break infered closure return type

[swift-ci]

Previous ID	SR-563
Radar	None
Original Reporter	revanistT3 (JIRA User)
Type	Bug
Status	Resolved
Resolution	Won't Do

Environment

ubuntu 15.10

Swift version 2.2-dev (LLVM 3ebdbb2c7e, Clang f66c5bb67b, Swift 54dcd16)
Target: x86_64-unknown-linux-gnu

Additional Detail from JIRA

Votes	0
Component/s
Labels	Bug
Assignee	None
Priority	Medium

md5: d461b2a9257f701e02837cec155b5b67

Issue Description:

//compiles
let y = {
true
}
//does not compile
let y = {
if $1 > 1 {false}
true
}
//returns error "unable to infer closure type in the current context"

[belkadan]

The error message is correct. Swift does not infer the types of closures from their bodies except those that contain a single expression.