[SR-9920] Compiler error when an empty "return" precedes an "@unknown default" case.

[swift-ci]

Previous ID	SR-9920
Radar	rdar://problem/48634159
Original Reporter	pappy (JIRA User)
Type	Bug
Status	Resolved
Resolution	Done

Environment

Version 10.2 beta 2 (10P91b)

Additional Detail from JIRA

Votes	0
Component/s	Compiler
Labels	Bug
Assignee	@belkadan
Priority	Medium

md5: b2a20da52a07f32a58733f33075263f5

is duplicated by:

• SR-11014 Using a void return immediately before an @unknown default results in a compilation error

Issue Description:

Imagine enum is a non-exhaustive enum.

switch enum {

{{ case .blah: return}}

@unknown default: break

{{}}}

Results in an "expected expression in 'return' statement"

Adding a semicolon makes the error go away, but ew.

[belkadan]

#22974

[belkadan]

Fixed, though I'm afraid that won't make it into 5.0, since there's a workaround.